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GSK3640254

Phase 2

HIV Infections | Small molecule | Infectious Disease |GSK plc|Last Updated: Aug 29, 2024

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
Premium
Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
Premium
Trial Design
RandomizedDouble-BlindCONTROLLEDBiomarker
Total Trials9
Total Enrollment282
FDA Designations
No designations recorded
Clinical Trials (9)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03784079A Proof of Concept Study of GSK3640254 in Human Immunodeficiency Virus-1 (HIV-1) Infected Treatment-naive AdultsPHASE2 COMPLETED 34Jan 31, 2019Feb 6, 2020Feb 16, 202123 United States, France +4
NCT04857892A Relative Bioavailability and Food-Effect Study of the Fixed Dose Combination of GSK3640254 and Dolutegravir (DTG) in Healthy ParticipantsPHASE1 COMPLETED 41Apr 21, 2021Sep 10, 2021Mar 12, 20241 United States
NCT04425902Evaluation of Pharmacokinetic Interaction Between GSK3640254 and Caffeine, Metoprolol, Montelukast, Flurbiprofen, Omeprazole, Midazolam, Digoxin, and Pravastatin in Healthy AdultsPHASE1 COMPLETED 20Dec 16, 2020Mar 10, 2021Jan 5, 20241 United States
NCT04563845Effect of Therapeutic and Supratherapeutic Oral Doses of GSK3640254 on Cardiac Conduction Compared to Placebo and a Single Oral Dose of MoxifloxacinPHASE1 COMPLETED 50Nov 9, 2020Oct 30, 2021Dec 6, 20231 United States
NCT04630002Drug-drug Interaction (DDI) Study of GSK3640254 With Darunavir/Ritonavir (DRV/RTV) and Etravirine (ETR)PHASE1 COMPLETED 54Oct 28, 2020Oct 2, 2021Aug 29, 20241 United States
NCT04507321Pharmacokinetics and Metabolism of 14 Carbon [14C]-GSK3640254PHASE1 COMPLETED 5Sep 24, 2020Nov 23, 2020Jan 31, 20221 United Kingdom
NCT04263142A Relative Bioavailability and Food-Effect Study of GSK3640254 Tablet and Capsule Formulations in Healthy ParticipantsPHASE1 COMPLETED 39Jan 27, 2020Mar 24, 2020Mar 3, 20211 United States
NCT03984825Effect of GSK3640254 on the Pharmacokinetics of a Combination Oral ContraceptivePHASE1 COMPLETED 23Jun 13, 2019Aug 16, 2019Aug 27, 20201 United States
NCT03816696Study to Evaluate the Pharmacokinetic (PK) Interactions Between GSK3640254 and Dolutegravir (DTG)PHASE1 COMPLETED 16Jan 23, 2019Apr 10, 2019Mar 19, 20201 United States
Unlock Drug Trial Details
Study Endpoints
Primary Endpoints
Part 1: Maximum Change From Baseline in Plasma Human Immunodeficiency Virus-1 (HIV-1) Ribonucleic Acid (RNA) at Day 11
Baseline (Day 1) and Day 11

Plasma samples were collected for quantitative analysis of plasma HIV-1 RNA. A HIV-1 RNA polymerase chain reaction (PCR) assay with a lower limit of detection (LLOD) of 50 copies per milliliter was used. Baseline value was the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 2: Maximum Change From Baseline in Plasma HIV-1 RNA at Day 8
Baseline (Day 1) and Day 8

Plasma samples were collected for quantitative analysis of plasma HIV-1 RNA. An HIV-1 RNA PCR assay with an LLOD of 50 copies per milliliter was used. Baseline value was the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Area Under the Plasma Concentration-time Curve From Time 0 Extrapolated to Infinity (AUC[0-inf]) of GSK3640254
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of GSK3640254.

Part 1: Area Under the Plasma Concentration-time Curve From Time 0 to Time t (AUC[0-t]) of GSK3640254
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for PK analysis of GSK3640254.

Part 1: Maximum Observed Concentration (Cmax) of GSK3640254
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for PK analysis of GSK3640254.

Part 1: AUC(0-inf) of DTG
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for PK analysis of DTG.

Part 1: AUC(0-t) of DTG
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for PK analysis of DTG.

Part 1: Cmax of DTG
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for PK analysis of DTG.

Part 2: AUC(0-inf) of GSK3640254
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for PK analysis of GSK3640254.

Part 2: AUC(0-t) of GSK3640254
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period.

Blood samples were collected at indicated time points for PK analysis of GSK3640254.

Part 2: Cmax of GSK3640254
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for PK analysis of GSK3640254.

Part 2: AUC(0-inf) of DTG
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for PK analysis of DTG.

Part 2: AUC(0-t) of DTG
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for PK analysis of DTG.

Part 2: Cmax of DTG
Pre-dose, 30 minutes, 1 hour, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72, 96 hours post dose in each treatment period

Blood samples were collected at indicated time points for PK analysis of DTG.

Area Under the Plasma Concentration-time Curve (AUC) From Time Zero to Time t (AUC[0-t]) for Caffeine
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of caffeine. Area under the plasma concentration-time curve from time zero to time t, to be calculated using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

AUC From Time Zero Extrapolated to Infinity (AUC[0-infinity]) for Caffeine
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of caffeine. The AUC(0-infinity) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

Maximum Observed Plasma Concentration (Cmax) for Caffeine
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of caffeine.

Time to Cmax (Tmax) for Caffeine
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of caffeine.

Apparent Terminal Phase Half-life (t1/2) for Caffeine
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of caffeine.

AUC(0-t) for Metoprolol
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of metoprolol. The AUC(0-t) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

AUC(0-infinity) for Metoprolol
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of metoprolol. The AUC(0-infinity) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

Cmax for Metoprolol
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of metoprolol.

Tmax for Metoprolol
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of metoprolol.

t1/2 for Metoprolol
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of metoprolol.

AUC(0-t) for Montelukast
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of montelukast. The AUC(0-t) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

AUC(0-infinity) for Montelukast
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of montelukast. The AUC(0-infinity) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

Cmax for Montelukast
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of montelukast.

Tmax for Montelukast
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of montelukast.

t1/2 for Montelukast
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of montelukast.

AUC(0-t) for Flurbiprofen
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of flurbiprofen. The AUC(0-t) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

AUC(0-infinity) for Flurbiprofen
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of flurbiprofen. The AUC(0-infinity) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

Cmax for Flurbiprofen
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of flurbiprofen.

Tmax for Flurbiprofen
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of flurbiprofen.

t1/2 for Flurbiprofen
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of flurbiprofen.

AUC(0-t) for Omeprazole
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of omeprazole. The AUC(0-t) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

AUC(0-infinity) for Omeprazole
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of omeprazole. The AUC(0-infinity) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

Cmax for Omeprazole
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of omeprazole.

Tmax for Omeprazole
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of omeprazole.

t1/2 for Omeprazole
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of omeprazole.

AUC(0-t) for Midazolam
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of midazolam. The AUC(0-t) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

AUC(0-infinity) for Midazolam
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of midazolam. The AUC(0-infinity) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

Cmax for Midazolam
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of midazolam.

Tmax for Midazolam
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of midazolam.

t1/2 for Midazolam
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of midazolam.

AUC(0-t) for Digoxin
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of digoxin. The AUC(0-t) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

AUC(0-infinity) for Digoxin
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of digoxin. The AUC(0-infinity) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

Cmax for Digoxin
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of digoxin.

Tmax for Digoxin
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of digoxin.

t1/2 for Digoxin
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of digoxin.

AUC(0-t) for Pravastatin
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of pravastatin. The AUC(0-t) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

AUC(0-infinity) for Pravastatin
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of pravastatin. The AUC(0-infinity) was determined using the linear trapezoidal rule for each incremental trapezoid and the log trapezoidal rule for each decremental trapezoid.

Cmax for Pravastatin
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of pravastatin.

Tmax for Pravastatin
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of pravastatin.

t1/2 for Pravastatin
Pre-dose and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, and 120 hours post-dose in treatment period 1 and 3

Blood samples were collected at the indicated time points for pharmacokinetic analysis of pravastatin.

Part 1: Area Under the Plasma Concentration-time Curve From Time Zero to Time t (AUC[0-t]) of GSK3640254
Pre-dose and 30 minutes, 1 Hour, 2 Hours, 3 Hours, 3 Hours 30 minutes, 4 Hours, 4 Hours 30 minutes, 5 Hours, 6 Hours, 12 Hours, 24 Hours, 48 Hours post-dose on Day 7

Blood samples were collected at indicated time points. Pharmacokinetic (PK) analysis was conducted using standard non-compartmental methods.

Part 1: AUC From Time Zero to the End of the Dosing Interval at Steady State (AUC[0-tau]) of GSK3640254
Pre-dose and 30 minutes, 1 Hour, 2 Hours, 3 Hours, 3 Hours 30 minutes, 4 Hours, 4 Hours 30 minutes, 5 Hours, 6 Hours, 12 Hours, 24 Hours, 48 Hours post-dose on Day 7

Blood samples were collected at indicated time points. PK analysis was conducted using standard non-compartmental methods.

Part 1: Plasma Concentration at the End of the Dosing Interval (Ctau) of GSK3640254
Pre-dose and 30 minutes, 1 Hour, 2 Hours, 3 Hours, 3 Hours 30 minutes, 4 Hours, 4 Hours 30 minutes, 5 Hours, 6 Hours, 12 Hours, 24 Hours, 48 Hours post-dose on Day 7

Blood samples were collected at indicated time points. PK analysis was conducted using standard non-compartmental methods

Part 1: Time of Maximum Observed Concentration (Tmax) of GSK3640254
Pre-dose and 30 minutes, 1 Hour, 2 Hours, 3 Hours, 3 Hours 30 minutes, 4 Hours, 4 Hours 30 minutes, 5 Hours, 6 Hours, 12 Hours, 24 Hours, 48 Hours post-dose on Day 7

Blood samples were collected at indicated time points. PK analysis was conducted using standard non-compartmental methods.

Part 1: Plasma Concentration of GSK3640254
Pre-dose and 30 minutes, 1 Hour, 2 Hour, 3 Hours, 3 Hours 30 minutes, 4 Hours, 4 Hours 30 minutes, 5 Hours, 6 Hours, 12 Hours, 24 Hours, 48 Hours post-dose on Day 7

Blood samples were collected at indicated time points to analyze the plasma concentration of GSK3640254.

Part 1: Plasma Concentration of Major Metabolites of GSK3640254
Pre-dose and 30 minutes, 1 Hour, 2 Hour, 3 Hours, 3 Hours 30 minutes, 4 Hours, 4 Hours 30 minutes, 5 Hours, 6 Hours, 12 Hours, 24 Hours, 48 Hours post-dose on Day 7

Blood samples were to be collected at indicated time points to analyze the plasma concentration of major metabolites of GSK3640254.

Part 1: Number of Participants With Serious Adverse Events (SAEs) and Non-SAEs
Up to Day 9

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. An SAE is defined as any untoward medical occurrence that, at any dose that results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability or incapacity, is a congenital anomaly or birth defect as per medical and scientific judgment. Adverse events which were not Serious Adverse Events were considered as Non-Serious adverse events.

Part 1: Absolute Values for Hematology Parameter: Hemoglobin
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze hemoglobin. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Hematology Parameter: Hematocrit
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze hematocrit. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Hematology Parameter: Erythrocytes Mean Corpuscular Volume
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze erythrocytes mean corpuscular volume. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Hematology Parameter: Erythrocytes Mean Corpuscular Hemoglobin
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze erythrocytes mean corpuscular hemoglobin. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Hematology Parameter: Basophils, Eosinophils, Lymphocytes, Monocytes, Neutrophils, Platelets and Leukocytes
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze basophils, eosinophils, lymphocytes, monocytes, neutrophils, platelets and leukocytes. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. .

Part 1: Absolute Values for Hematology Parameter: Erythrocytes
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze erythrocytes. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Change From Baseline in Hematology Parameter: Hemoglobin
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze hemoglobin. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Hematology Parameter: Hematocrit
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated timepoints to analyze hemotocrit. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Hematology Parameter: Erythrocytes Mean Corpuscular Volume
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze erythrocytes mean corpuscular volume. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Hematology Parameter: Erythrocytes Mean Corpuscular Hemoglobin
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at idicated time points to analyze erythrocytes mean corpuscular hemoglobin. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Hematology Parameter: Basophils, Eosinophils, Lymphocytes, Monocytes, Neutrophils, Platelets and Leukocytes
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze basophils, eosinophils, lymphocytes, monocytes, neutrophils, platelets and leukocytes. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Hematology Parameter: Erythrocytes
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze the hematology parameter: Erythrocytes. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Absolute Values for Chemistry Parameters: Glucose, Cholesterol, Magnesium, Triglycerides, Anion Gap, Calcium, Carbon Dioxide, Chloride, Phosphate, Potassium, Sodium, and Blood Urea Nitrogen
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze glucose, cholesterol, magnesium, triglycerides, anion gap, calcium, carbon dioxide, chloride, phosphate, potassium, sodium, and blood urea nitrogen. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Chemistry Parameters: Alanine Aminotransferase (ALT), Alkaline Phosphatase (ALP), Aspartate Aminotransferase (AST), Gamma-glutamyl Transferase (GGT), Creatine Kinase, and Lactate Dehydrogenase
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze ALT, ALP, AST, GGT, creatine kinase, and lactate dehydrogenase. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Chemistry Parameters: Creatinine, Urate, Total Bilirubin, and Direct Bilirubin
Baseline (Day -2), Day 3, Day 7, Day 9

Blood samples were collected at indicated timepoints to analyze creatinine, urate, total bilirubin, and direct bilirubin. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Chemistry Parameters: Albumin, Globulin, and Total Protein
Baseline (Day -2), Day 3, Day 7, Day 9

Blood samples were collected at indicated timepoints to analyze albumin, globulin, and total protein. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Chemistry Parameters: Amylase and Lipase
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated timepoints to analyze amylase and lipase. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Change From Baseline in Chemistry Parameters: Glucose, Cholesterol, Magnesium, Triglycerides, Anion Gap, Calcium, Carbon Dioxide, Chloride, Phosphate, Potassium, Sodium, Blood Urea Nitrogen
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze glucose, cholesterol, magnesium, triglycerides, anion gap, calcium, carbon dioxide, chloride, phosphate, potassium, sodium, and blood urea nitrogen. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Chemistry Parameters: ALT, ALP, AST, GGT, Creatine Kinase, Lactate Dehydrogenase
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated time points to analyze ALT, ALP, AST, GGT, creatine kinase, and lactate dehydrogenase. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Chemistry Parameters: Creatinine, Urate, Total Bilirubin, Direct Bilirubin
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated timepoints to analyze creatinine, urate, total bilirubin, and direct bilirubin. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Chemistry Parameters: Albumin, Globulin, and Total Protein
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated timepoints to analyze albumin, globulin, and total protein. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value

Part 1: Change From Baseline in Chemistry Parameters: Amylase and Lipase
Baseline (Day -2), Day 3, Day 7, and Day 9

Blood samples were collected at indicated timepoints to analyze amylase and lipase. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Absolute Values for Urinalysis Parameter: Specific Gravity
Baseline (Day -2), Day 3, Day 7, and Day 9

Urine samples were collected at indicated time points to analyze the urine specific gravity. Urine specific gravity is a measure of the concentration of solutes in the urine and provides information on the kidney's ability to concentrate urine. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Urinalysis Parameter: Potential of Hydrogen (pH)
Baseline (Day -2), Day 3, Day 7, and Day 9

Urine samples were collected at indicated time points to analyze the urine pH by dipstick test. The dipstick test gives results in a semi-quantitative manner indicating proportional concentrations in the urine sample. Urine pH is an acid-base measurement. pH is measured on a numeric scale ranging from 0 to 14; values on the scale refer to the degree of alkalinity or acidity. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic. Normal urine has a slightly acidic pH (5.0 - 6.0). Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Change From Baseline in Urinalysis Parameter: Specific Gravity
Baseline (Day -2), Day 3, Day 7, and Day 9

Urine samples were collected at indicated time points to analyze the urine specific gravity. Urine specific gravity is a measure of the concentration of solutes in the urine and provides information on the kidney's ability to concentrate urine. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Urinalysis Parameter: pH
Baseline (Day -2), Day 3, Day 7, and Day 9

Urine samples were collected at indicated time points to analyze the urine pH by dipstick test. The dipstick test gives results in a semi-quantitative manner indicating proportional concentrations in the urine sample. Urine pH is an acid-base measurement. pH is measured on a numeric scale ranging from 0 to 14; values on the scale refer to the degree of alkalinity or acidity. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic. Normal urine has a slightly acidic pH (5.0 - 6.0). Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits. Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.

Part 1: Number of Participants With Clinically Significant Abnormal 12-Lead Electrocardiogram (ECG) Findings
Baseline(Day-2), Day1: 2 Hours, 4 Hours, 6 Hours; Day 4: 2 Hours, 4 Hours, 6 Hours, Day 7: 2 Hours, 4 Hours, 6 Hours and Day 9

A 12-lead ECG was recorded with the participant in a supine position. 12-lead ECGs were obtained by using an automated ECG machine. Clinically significant abnormal findings are those which are not associated with the underlying disease, unless judged by the investigator to be more severe than expected for the participant's condition. Data for number of participants with clinically significant abnormal 12-Lead ECG findings has reported

Part 1: Absolute Values for Vital Parameters: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)
Baseline (Pre-dose, Day 1), Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8 and Day 9

SBP and DBP were measured in the semi-recumbent or supine position with a completely automated device after at least 5 minutes of rest for the participant in a quiet setting without distractions. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Vital Parameter: Pulse Rate
Baseline (Pre-dose, Day 1), Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8 and Day 9

Pulse rate was measured in the semi-recumbent or supine position with a completely automated device after at least 5 minutes of rest for the participant in a quiet setting without distractions. Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 1: Absolute Values for Vital Parameter: Temperature
Baseline (Pre-dose, Day 1), Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8 and Day 9

Temperature was measured in the semi-recumbent or supine position with a completely automated device after at least 5 minutes of rest for the participant in a quiet setting without distractions.Baseline was defined as the latest pre-dose assessment with a non-missing value, including those from unscheduled visits.

Part 2: Placebo-corrected Change From Baseline in QT Interval Corrected for Heart Rate Using Fridericia's Formula (QTcF) Following Administration of GSK3640254 100 mg and GSK3640254 500 mg Using Concentration-QTc (C-QTc) Analysis
Baseline (Pre-dose, Day 1) and up to Day 7

Twelve-lead ECGs were recorded in participant using automated ECG machine \& performed with participant in supine position after a rest of at least 10 minutes.Baseline was defined as the latest pre-dose assessment with a non-missing value for each visit. Change from Baseline was calculated by subtracting Baseline value from post dose value. Placebo-corrected change from Baseline in QT interval corrected for heart rate using Fridericia's formula (QTcF) was calculated as difference in model-predicted mean change from Baseline in QTcF between treatment groups using C-QTc analysis. A linear mixed-effects model with change from Baseline in QTcF as the dependent variable, time-matched GSK3640254 plasma concentration as a fixed effect, centered Baseline as additional covariate,treatment \&time as categorical factors, \& a random intercept \& slope per participant. In all calculations, concentrations in participants who received placebo were set to 0.

Part 2: Plasma Concentration of GSK3640254
Pre-dose and 30 minutes, 1 Hour, 2 Hour, 3 Hours, 3 Hours 30 minutes, 4 Hours, 4 Hours 30 minutes, 5 Hours, 6 Hours, 8 Hours, 10 Hours, 12 Hours, 24 Hours post-dose on Day 7 in each treatment period

Blood samples were collected at indicated time points to analyze the plasma concentration of GSK3640254.

Part 2: Plasma Concentration of Major Metabolites of GSK3640254
Pre-dose and 30 minutes, 1 Hour, 2 Hour, 3 Hours, 3 Hours 30 minutes, 4 Hours, 4 Hours 30 minutes, 5 Hours, 6 Hours, 8 Hours, 10 Hours, 12 Hours, 24 Hours post-dose on Day 7 in each treatment period

Blood samples were to be collected at indicated time points to analyze the plasma concentration of major metabolites of GSK3640254.

Cohort 1: Area Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval at Steady State (AUC[0-tau]) of GSK3640254
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours, 16 Hours, 24 Hours post-dose in Treatment Periods 1 and 3

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 1: Maximum Observed Concentration (Cmax) of GSK3640254
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours, 16 Hours, 24 Hours post-dose in Treatment Periods 1 and 3

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 1: AUC(0-tau) of DRV
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours post-dose in Treatment Periods 2 and 3

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 1: Cmax of DRV
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours post-dose in Treatment Periods 2 and 3

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 1: AUC(0-tau) of RTV
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours post-dose in Treatment Periods 2 and 3

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 1: Cmax of RTV
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours post-dose in Treatment Periods 2 and 3

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 2: AUC(0-tau) of GSK3640254
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours, 16 Hours, 24 Hours post-dose in Treatment Periods 1 and 3

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 2: Cmax of GSK3640254
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours, 16 Hours, 24 Hours post-dose in Treatment Periods 1 and 3

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 2: AUC(0-tau) of ETR
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours post-dose in Treatment Periods 2 and 3

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 2: Cmax of ETR
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours post-dose in Treatment Periods 2 and 3

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 3: AUC(0-tau) of GSK3640254
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours, 16 Hours, 24 Hours post-dose in Treatment Periods 1 and 2

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Cohort 3: Cmax of GSK3640254
Pre-dose and 0.5 Hours, 1 Hour, 1.5 Hours, 2 Hours, 3 Hours, 4 Hours, 6 Hours, 8 Hours, 12 Hours, 16 Hours, 24 Hours post-dose in Treatment Periods 1 and 2

Blood samples were collected at indicated time points. Pharmacokinetic analysis was conducted using standard non-compartmental methods.

Area Under the Concentration-time Curve From Time Zero (Pre-dose) Extrapolated to Infinite Time (AUC[0-inf]) in Plasma Following Administration of Oral Dose of GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for Pharmacokinetic (PK) analysis. PK parameters were calculated by standard non-compartmental analysis.

AUC(0-inf) of Total Radioactivity in Blood Following Administration of Oral Dose of GSK3640254
Day 1: 2, 4, 6, 8, 10 hours

Blood samples were collected at indicated time points. Data was not collected because a discrepancy has been identified in the Objectives and Endpoints section of the Protocol, which incorrectly states one of the Primary Endpoints. The Objectives and Endpoints section incorrectly states that the PK parameters of both the parent and total drug-related material (radioactivity) in plasma and blood would be presented. Neither the Schedule of Activities nor the Study Assessments and Procedures sections of the Protocol address the sampling and measurement of concentrations of parent drug in blood or calculation of derived PK parameters. Consequently, no parent analyte measurements were performed for blood samples. Thus, the reference to parent analyte specifically for blood, in the Objectives and Endpoints section was an error. Only samples and measurements for total drug-related material (radioactivity) in blood and plasma, and parent drug in plasma were collected to derive PK parameters.

AUC(0-inf) in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

AUC(0-inf) of Total Radioactivity in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

AUC(0-inf) in Plasma Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

AUC(0-inf) of Total Radioactivity in Plasma Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

AUC(0-inf) of Total Radioactivity in Blood Following Administration of Oral Dose of [14C]-GSK3640254
Day 1: 2, 4, 6, 8, 10 hours

Blood samples were collected at indicated time points for PK analysis. Data was not collected for this Outcome measure as AUC(0-inf) is not calculable for total radioactivity in blood due to insufficient sampling in the terminal phase.

AUC From Time Zero (Pre-dose) to Last Time of Quantifiable Concentration (AUC[0-t]) in Plasma Following Administration of Oral Dose of GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

AUC(0-t) of Total Radioactivity in Blood Following Administration of Oral Dose of GSK3640254
Day 1: 2, 4, 6, 8, 10 hours

Blood samples were collected at indicated time points. Data was not collected because a discrepancy has been identified in the Objectives and Endpoints section of the Protocol, which incorrectly states one of the Primary Endpoints. The Objectives and Endpoints section incorrectly states that the PK parameters of both the parent and total drug-related material (radioactivity) in plasma and blood would be presented. Neither the Schedule of Activities nor the Study Assessments and Procedures sections of the Protocol address the sampling and measurement of concentrations of parent drug in blood or calculation of derived PK parameters. Consequently, no parent analyte measurements were performed for blood samples. Thus, the reference to parent analyte specifically for blood, in the Objectives and Endpoints section was an error. Only samples and measurements for total drug-related material (radioactivity) in blood and plasma, and parent drug in plasma were collected to derive PK parameters.

AUC(0-t) in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

AUC(0-t) of Total Radioactivity in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

AUC (0-t) in Plasma Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

AUC(0-t) of Total Radioactivity in Plasma Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

AUC(0-t) of Total Radioactivity in Blood Following Administration of Oral Dose of [14C]-GSK3640254
Day 1: 2, 4, 6, 8, 10 hours

Blood samples were collected at indicated time points for PK analysis.

Maximum Observed Concentration (Cmax) in Plasma Following Administration of Oral Dose of GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Cmax of Total Radioactivity in Blood Following Administration of Oral Dose of GSK3640254
Day 1: 2, 4, 6, 8, 10 hours

Blood samples were collected at indicated time points. Data was not collected because a discrepancy has been identified in the Objectives and Endpoints section of the Protocol, which incorrectly states one of the Primary Endpoints. The Objectives and Endpoints section incorrectly states that the PK parameters of both the parent and total drug-related material (radioactivity) in plasma and blood would be presented. Neither the Schedule of Activities nor the Study Assessments and Procedures sections of the Protocol address the sampling and measurement of concentrations of parent drug in blood or calculation of derived PK parameters. Consequently, no parent analyte measurements were performed for blood samples. Thus, the reference to parent analyte specifically for blood, in the Objectives and Endpoints section was an error. Only samples and measurements for total drug-related material (radioactivity) in blood and plasma, and parent drug in plasma were collected to derive PK parameters.

Cmax in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Cmax of Total Radioactivity in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Cmax in Plasma Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Cmax of Total Radioactivity in Plasma Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Cmax of Total Radioactivity in Blood Following Administration of Oral Dose of [14C]-GSK3640254
Day 1: 2, 4, 6, 8, 10 hours

Blood samples were collected at indicated time points for PK analysis.

Time of Occurrence of Cmax (Tmax) in Plasma Following Administration of Oral Dose of GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Tmax of Total Radioactivity in Blood Following Administration of Oral Dose of GSK3640254
Day 1: 2, 4, 6, 8, 10 hours

Blood samples were collected at indicated time points. Data was not collected because a discrepancy has been identified in the Objectives and Endpoints section of the Protocol, which incorrectly states one of the Primary Endpoints. The Objectives and Endpoints section incorrectly states that the PK parameters of both the parent and total drug-related material (radioactivity) in plasma and blood would be presented. Neither the Schedule of Activities nor the Study Assessments and Procedures sections of the Protocol address the sampling and measurement of concentrations of parent drug in blood or calculation of derived PK parameters. Consequently, no parent analyte measurements were performed for blood samples. Thus, the reference to parent analyte specifically for blood, in the Objectives and Endpoints section was an error. Only samples and measurements for total drug-related material (radioactivity) in blood and plasma, and parent drug in plasma were collected to derive PK parameters.

Tmax in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Tmax of Total Radioactivity in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Tmax in Plasma Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Tmax of Total Radioactivity in Plasma Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Tmax of Total Radioactivity in Blood Following Administration of Oral Dose of [14C]-GSK3640254
Day 1: 2, 4, 6, 8, 10 hours

Blood samples were collected at indicated time points for PK analysis.

Terminal Phase Half-life (T1/2) in Plasma Following Administration of Oral Dose of GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

T1/2 of Total Radioactivity in Blood Following Administration of Oral Dose of GSK3640254
Day 1: 2, 4, 6, 8, 10 hours

Blood samples were collected at indicated time points. Data was not collected because a discrepancy has been identified in the Objectives and Endpoints section of the Protocol, which incorrectly states one of the Primary Endpoints. The Objectives and Endpoints section incorrectly states that the PK parameters of both the parent and total drug-related material (radioactivity) in plasma and blood would be presented. Neither the Schedule of Activities nor the Study Assessments and Procedures sections of the Protocol address the sampling and measurement of concentrations of parent drug in blood or calculation of derived PK parameters. Consequently, no parent analyte measurements were performed for blood samples. Thus, the reference to parent analyte specifically for blood, in the Objectives and Endpoints section was an error. Only samples and measurements for total drug-related material (radioactivity) in blood and plasma, and parent drug in plasma were collected to derive PK parameters.

T1/2 in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

T1/2 of Total Radioactivity in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

T1/2 in Plasma Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

T1/2 of Total Radioactivity in Plasma Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

T1/2 of Total Radioactivity in Blood Following Administration of Oral Dose of [14C]-GSK3640254
Day 1: 2, 4, 6, 8, 10 hours

Blood samples were collected at indicated time points for PK analysis. Data was not collected for this Outcome measure as T1/2 is not calculable for total radioactivity in blood due to insufficient sampling in the terminal phase.

Volume of Distribution at Steady State (Vss) in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Clearance (CL) in Plasma Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Renal Clearance (CLr) Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. Renal clearance was calculated as (Cumulative amount \[Ae\]\[Urine\] for Period 1)/(Plasma AUC\[0-inf\]).

CLr Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. Renal clearance was calculated as (Cumulative Ae\[Urine\] for Period 2)/(Plasma AUC\[0-inf\]).

Oral Clearance (CL/F) in Plasma Following Administration of Oral Dose of GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

CL/F in Plasma Following Administration Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Apparent Volume of Distribution (Vz/F) Following Administration of Oral Dose of GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Vz/F Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. PK parameters were calculated by standard non-compartmental analysis.

Absolute Oral Bioavailability of GSK3640254
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Absolute bioavailability is the amount of drug from a formulation that reaches the systemic circulation relative to an IV dose, computed as ratio of AUC(Oral Tablet)/Dose(Oral Tablet) with AUC(IV)/Dose(IV). Plasma samples were collected from participants at indicated time points. Absolute bioavailability from the oral tablet and IV doses were analyzed using AUC(0-inf) and AUC(0-t) pharmacokinetic parameters.

Percentage of Drug Escaping First Pass Hepatic Clearance (Fh) Following Administration of [14C]-GSK3640254 IV
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.25, 5.5, 6, 7, 8, 9, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. Fh was expressed as percentage and was calculated as: 1 minus hepatic extraction ratio multiplied by 100. Hepatic extraction ratio=hepatic blood clearance (milliliters per minute)/hepatic blood flow (milliliters per minute).

Percentage of Drug Absorbed (Fa) Following Administration of [14C]-GSK3640254 Oral Suspension
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. Fa was expressed as percentage which was calculated as ratio of oral bioavailability and Fh multiplied by 100.

Percentage of Drug Escaping Gut Metabolism (Fg) Following Administration of [14C]-GSK3640254 Oral Suspension
Day 1 (Pre-dose), 0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 5.5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144 and 168 hours post-dose

Blood samples were collected at the indicated time points for PK analysis. Fg is defined as the fraction metabolized by gut wall as a fraction of the oral dose and was expressed as 1 minus Metabolite load following intravenous and oral administration multiplied by 100.

Percentage of Total Radioactive Dose Excreted in Urine Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 5, 24, 48, 72, 96, 120, 144 and 163 hours post-dose

Urine samples were collected at indicated timepoints to measure percentage of the total radioactive drug-related material excreted in urine. Percentage of radioactive dose excreted in urine was calculated as (amount excreted in urine divided by administered radioactivity dose) multiplied by 100. Not applicable (NA) indicates that No concentration values detected for pre-dose.

Percentage of Total Radioactive Dose Excreted in Urine Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 24, 48, 72, 96, 120, 144, 168, 192, 216, 240, 264 and 288 hours post-dose

Urine samples were collected at indicated timepoints to measure percentage of the total radioactive drug-related material excreted in urine. Percentage of radioactive dose excreted in urine was calculated as (amount excreted in urine divided by administered radioactivity dose) multiplied by 100.

Percentage of Total Radioactive Dose Excreted in Feces Following Administration of IV Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 24, 48, 72, 96, 120, 144 and 163 hours post-dose

Fecal samples were collected at indicated timepoints to measure percentage of the total radioactive drug-related material excreted in feces. Percentage of radioactive dose excreted was calculated as (amount excreted in feces homogenate divided by administered radioactivity dose) multiplied by 100. NA indicates that No concentration values detected for pre-dose.

Percentage of Total Radioactive Dose Excreted in Feces Following Administration of Oral Dose of [14C]-GSK3640254
Day 1 (Pre-dose), 24, 48, 72, 96, 120, 144, 168, 192, 216, 240, 264 and 288 hours post-dose

Fecal samples were collected at indicated timepoints to measure percentage of the total radioactive drug-related material excreted in feces. Percentage of radioactive dose excreted was calculated as (amount excreted in feces homogenate divided by administered radioactivity dose) multiplied by 100.

Area Under the Plasma Concentration-time Curve From Time Zero Extrapolated to Infinity (AUC[0 to Inf]) for GSK3640254-Part 1
pre-dose, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72 and 96 hours post-dose

Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis. PK parameters were calculated using standard non-compartmental analysis.

Area Under the Plasma Concentration-time Curve From Time Zero Extrapolated to Time t (AUC[0 to t]) for GSK3640254-Part 1
pre-dose, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72 and 96 hours post-dose

Blood samples were collected at indicated time points for PK analysis. PK parameters were calculated using standard non-compartmental analysis.

Maximum Observed Concentration (Cmax) for GSK3640254-Part 1
pre-dose, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72 and 96 hours post-dose

Blood samples were collected at indicated time points for PK analysis. PK parameters were calculated using standard non-compartmental analysis.

Time of Maximum Observed Concentration for GSK3640254-Part 1
pre-dose, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72 and 96 hours post-dose

Blood samples were collected at indicated time points for PK analysis. PK parameters were calculated using standard non-compartmental analysis.

AUC(0 to Inf) for GSK3640254-Part 2
pre-dose, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72 and 96 hours post-dose

Blood samples were collected at indicated time points for PK analysis. PK parameters were calculated using standard non-compartmental analysis.

AUC(0 to t) for GSK3640254-Part 2
pre-dose, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72 and 96 hours post-dose

Blood samples were collected at indicated time points for PK analysis. PK parameters were calculated using standard non-compartmental analysis.

Cmax for GSK3640254-Part 2
pre-dose, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72 and 96 hours post-dose

Blood samples were collected at indicated time points for PK analysis. PK parameters were calculated using standard non-compartmental analysis.

Time of Maximum Observed Concentration for GSK3640254-Part 2
pre-dose, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12, 24, 48, 72 and 96 hours post-dose

Blood samples were collected at indicated time points for PK analysis. PK parameters were calculated using standard non-compartmental analysis.

Period 1: Area Under the Plasma Concentration-time Curve From Time 0 to the End of the Dosing Interval at Steady State (AUC [0-tau]) of EE
Day 10: Pre-dose, 0.25, 0.5, 1, 1.5, 2, 3, 4, 7, 12 hours and Day 11: 24 hours

Blood samples were collected at indicated time points for the analysis of AUC (0-tau) of EE. PK parameters were calculated by standard non-compartmental analysis. The PK population included all participants who underwent plasma PK sampling and had evaluable PK parameters estimated.

Period 2: AUC (0-tau) of EE
Day 21: Pre-dose, 0.25, 0.5, 1, 1.5, 2, 3, 4, 7, 12 and 24 hours post dose

Blood samples were collected at indicated time points for the analysis of AUC (0-tau) of EE. PK parameters were calculated by standard non-compartmental analysis.

Period 1:AUC (0-tau) of LNG
Day 10: Pre-dose, 0.25, 0.5, 1, 1.5, 2, 3, 4, 7, 12 hours and Day 11: 24 hours

Blood samples were collected at indicated time points for the analysis of AUC (0-tau) of LNG. PK parameters were calculated by standard non-compartmental analysis.

Period 2: AUC (0-tau) of LNG
Day 21: Pre-dose, 0.25, 0.5, 1, 1.5, 2, 3, 4, 7, 12 and 24 hours post dose

Blood samples were collected at indicated time points for the analysis of AUC (0-tau) of LNG. PK parameters were calculated by standard non-compartmental analysis.

Period 1: Maximum Observed Concentration (Cmax) and Plasma Concentration at the End of the Dosing Interval (Ctau) of EE
Day 10: Pre-dose, 0.25, 0.5, 1, 1.5, 2, 3, 4, 7, 12 hours and Day 11: 24 hours

Blood samples were collected at indicated time points for the analysis of Cmax and Ctau of EE. PK parameters were calculated by standard non-compartmental analysis.

Period 2: Cmax and Ctau of EE
Day 21: Pre-dose, 0.25, 0.5, 1, 1.5, 2, 3, 4, 7, 12 and 24 hours

Blood samples were collected at indicated time points for the analysis of Cmax and Ctau of EE. PK parameters were calculated by standard non-compartmental analysis.

Period 1:Cmax and Ctau of LNG
Day 10: Pre-dose, 0.25, 0.5, 1, 1.5, 2, 3, 4, 7, 12 hours and Day 11: 24 hours

Blood samples were collected at indicated time points for the analysis of Cmax and Ctau of LNG. PK parameters were calculated by standard non-compartmental analysis.

Period 2: Cmax and Ctau of LNG
Day 21: Pre-dose, 0.25, 0.5, 1, 1.5, 2, 3, 4, 7, 12 and 24 hours post dose

Blood samples were collected at indicated time points for the analysis of Cmax and Ctau of LNG. PK parameters were calculated by standard non-compartmental analysis.

Period 1: Area Under the Plasma Concentration-time Curve From Time 0 to the End of the Dosing (AUC[0 to Tau]) of Dolutegravir for Dolutegravir Arm
Day 5: Pre-dose, 1, 1.5, 2, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of dolutegravir. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. Pharmacokinetic Parameter Population consisted of all participants who underwent plasma pharmacokinetic sampling and had evaluable pharmacokinetic parameters estimated.

Period 3: AUC(0 to Tau) of Dolutegravir for Dolutegravir + GSK3640254 Arm
Day 7: Pre-dose, 1, 1.5, 2, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of dolutegravir. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Period 1: Maximum Observed Concentration (Cmax) of Dolutegravir for Dolutegravir Arm
Day 5: Pre-dose, 1, 1.5, 2, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of dolutegravir. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Period 3: Cmax of Dolutegravir for Dolutegravir + GSK3640254 Arm
Day 7: Pre-dose, 1, 1.5, 2, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of dolutegravir. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Period 1: Plasma Concentration at the End of the Dosing Interval (Ctau) of Dolutegravir for Dolutegravir Arm
Day 5: Pre-dose, 1, 1.5, 2, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of dolutegravir. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Period 3: Ctau of Dolutegravir for Dolutegravir + GSK3640254 Arm
Day 7: Pre-dose, 1, 1.5, 2, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of dolutegravir. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Period 2: AUC(0 to Tau) of GSK3640254 for GSK3640254 Arm
Day 7: Pre-dose, 1, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of GSK3640254. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Period 3: AUC(0 to Tau) of GSK3640254 for Dolutegravir + GSK3640254 Arm
Day 7: Pre-dose, 1, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of GSK3640254. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Period 2: Cmax of GSK3640254 for GSK3640254 Arm
Day 7: Pre-dose, 1, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of GSK3640254. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Period 3: Cmax of GSK3640254 for Dolutegravir + GSK3640254 Arm
Day 7: Pre-dose, 1, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of GSK3640254. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Period 2: Ctau of GSK3640254 for GSK3640254 Arm
Day 7: Pre-dose, 1, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of GSK3640254. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Period 3: Ctau of GSK3640254 for Dolutegravir + GSK3640254 Arm
Day 7: Pre-dose, 1, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 12 and 24 hours post-dose

Blood samples were collected at the indicated time points for pharmacokinetic analysis of GSK3640254. The pharmacokinetic parameters were calculated by standard non-compartmental analysis.

Secondary Endpoints
Part 1: Number of Participants With Non-Serious Adverse Events (Non-SAEs) and Serious Adverse Events (SAEs)
Up to Day 24
Part 2: Number of Participants With Non-SAEs and SAEs
Up to Day 12
Part 1: Change From Baseline in Hematology Parameters: Basophils, Eosinophils, Lymphocytes, Monocytes, Neutrophils, Leukocytes, Platelet Count
Baseline (Day 1) and Visit 5 (Days 8 to 10)
Unlock Study Endpoints
Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part 1: GSK3640254 10 mgEXPERIMENTALParticipants will receive GSK3640254 10 milligram (mg), capsules, orally for 10 days.
Part 1: GSK3640254 200 mgEXPERIMENTALParticipants will receive GSK3640254 200 mg, capsules, orally for 10 days.
Part 1: PlaceboPLACEBO_COMPARATORParticipants will receive placebo capsules, orally for 10 days.
Part 2: GSK3640254 40 mgEXPERIMENTALParticipants will receive GSK3640254 40 mg, capsules, orally for 7 days.
Part 2: GSK3640254 80 mgEXPERIMENTALParticipants will receive GSK3640254 80 mg, capsules, orally for 7 days.
Part 2: GSK3640254 140 mgEXPERIMENTALParticipants will receive GSK3640254 140 mg, capsules, orally for 7 days.
Part 2: PlaceboPLACEBO_COMPARATORParticipants will receive placebo capsules, orally for 7 days.
Part 1 : Treatment sequence ABCEXPERIMENTALParticipants will receive a single oral dose of GSK3640254 25 milligrams (mg) (2 x tablets), GSK3640254 100 mg (1 x tablet) and DTG 50 mg (1 x tablet) administered together under moderate fat and calorie conditions (reference) (Treatment A) in Period 1, followed by a single oral dose of GSK3640254/DTG, 150 mg/50 mg (1 x monolayer tablet) FDC administered under moderate fat and calorie conditions (Treatment B) in Period 2. In Period 3, participants will receive a single oral dose of GSK3640254 / DTG, 150 mg/50 mg (1 x bilayer tablet) FDC administered under moderate fat and calorie conditions (Treatment C).
Part 1 : Treatment sequence BCAEXPERIMENTALParticipants will receive a single oral dose of GSK3640254/DTG, 150 mg/50 mg (1 x monolayer tablet) FDC administered under moderate fat and calorie conditions (Treatment B) in Period 1, followed by a single oral dose of GSK3640254 / DTG, 150 mg/50 mg (1 x bilayer tablet) FDC administered under moderate fat and calorie conditions (Treatment C) in Period 2. In Period 3 participants will receive a single oral dose of GSK3640254 25 mg (2 x tablets), GSK3640254 100 mg (1 x tablet) and DTG 50 mg (1 x tablet) administered together under moderate fat and calorie conditions (reference) (Treatment A).
Part 1 : Treatment sequence CABEXPERIMENTALParticipants will receive a single oral dose of GSK3640254 / DTG, 150 mg/50 mg (1 x bilayer tablet) FDC administered under moderate fat and calorie conditions (Treatment C) in period 1, followed by a single oral dose of GSK3640254 25 mg (2 x tablets), GSK3640254 100 mg (1 x tablet) and DTG 50 mg (1 x tablet) administered together under moderate fat and calorie conditions (reference) (Treatment A) in Period 2. In Period 3 participants will receive a single oral dose of GSK3640254/DTG, 150 mg/50 mg (1 x monolayer tablet) FDC administered under moderate fat and calorie conditions (Treatment B).
Part 2 : Treatment sequence DEEXPERIMENTALParticipants will receive a single oral dose of selected FDC from Part 1 of GSK3640254/DTG, 150 mg/50 mg administered under high fat and calorie conditions (Treatment D) in Period 1 followed by a single oral dose of selected FDC from Part 1 of GSK3640254/DTG, 150 mg/50 mg administered under fasted conditions (Treatment E) in Period 2.
Part 2 : Treatment sequence EDEXPERIMENTALParticipants will receive a single oral dose of selected FDC from Part 1 of GSK3640254/DTG, 150 mg/50 mg administered under fasted conditions (Treatment E) in Period 1 followed by a single oral dose of selected FDC from Part 1 of GSK3640254/DTG, 150 mg/50 mg administered under high fat and calorie conditions (Treatment D) in Period 2.
Probe Substrates/GSK3640254 200 mg/Probe Substrates+GSK3640254EXPERIMENTALAll participants will receive a single dose of treatment A: Probe substrates (caffeine 200 milligram \[mg\], metoprolol 100 mg, montelukast 10 mg, flurbiprofen 100 mg, omeprazole 40 mg, midazolam 5 mg, digoxin 0.25 mg, and pravastatin 40 mg) on Day 1; followed by treatment B- GSK3640254 200 mg on Days 11 to 20; further followed by treatment C: Probe substrates (Caffeine 200 mg, metoprolol 100 mg, montelukast 10 mg, flurbiprofen 100 mg, omeprazole 40 mg, midazolam 5 mg, digoxin 0.25 mg, and pravastatin 40 mg) co-administered with GSK3640254 200 mg on Day 21.
Part 1: Participants receiving placeboPLACEBO_COMPARATORParticipants will receive a single dose of placebo once daily for 7 days following ingestion of a moderate fat meal.
Part 1: Participants receiving GSK3640254 500 milligrams (mg)EXPERIMENTALParticipants will receive a single dose of GSK3640254 500 mg once daily for 7 days following ingestion of a moderate fat meal.
Part 2: Main QTc StudyEXPERIMENTALParticipants will be randomized to 1:1:1:1 ratio to receive Treatment T- Therapeutic dose of GSK3640254 (100 mg QD) on Days 1 through 7 or Treatment ST- Supratherapeutic dose of GSK3640254 (to be determined from Part 1) on Days 1 through 7 or Treatment P- Placebo for GSK3640254 on Days 1 through 7 or Treatment M- Moxifloxacin (GSK3640254 placebo Days 1 through 6 and a single dose of Moxifloxacin \[400 mg\] on Day 7 in 4 treatment periods. There will be at least 7 days wash out period between each period.
Cohort 1: GSK3640254 then DRV/RTV then GSK3640254 + DRV/RTVEXPERIMENTALCohort 1 will include 3 periods. In Period 1 GSK3640254 will be administered (Treatment A). In Period 2 DRV/RTV will be administered (Treatment B). In Period 3 GSK3640254 (Treatment A) and DRV/RTV (Treatment B) will be administered.
Cohort 2: GSK3640254 then ETR then GSK3640254 + ETREXPERIMENTALCohort 2 will include 3 periods. In Period 1 GSK3640254 will be given (Treatment A). In Period 2 ETR will be given (Treatment C). In Period 3 GSK3640254 (Treatment A) and ETR (Treatment C) will be administered.
Cohort 3: GSK3640254 then GSK3640254 + DRV/RTV + ETREXPERIMENTALCohort 3 will include 2 periods. In Period 1 GSK3640254 will be administered (Treatment A). In Period 2 GSK3640254 (Treatment A), DRV/RTV (Treatment B), and ETR (Treatment C) will be administered.
GSK3640254 tablet + [14C]-GSK3640254 IV/[14C] oral suspensionEXPERIMENTALParticipants will receive a single oral dose of GSK3640254 200 milligram (mg) (2×100 mg) tablets with a moderate fat meal. Participants will then be administered a 100 microgram (mcg) dose (approximately 3.7 kilobecquerel; 100 nano Curie) of \[14C\]-GSK3640254 as an IV infusion for 1 hour on Day 1 in treatment Period 1, On Day 1 in treatment Period 2, participants will receive a single oral dose of 85 mg (approximately 3.15 megabecquerel; 85 micro Curie) \[14C\]-GSK3640254 administered as an oral suspension with a moderate fat meal. A wash out period of at least 13 days will be maintained between oral doses of treatment periods.
Part 1: Treatment ABEXPERIMENTALParticipants will receive a single dose of GSK3640254 200 mg (Treatment A- Reference), capsules, orally under moderate fat conditions on Day 1 in first intervention period; followed by GSK3640254 200 mg (Treatment B- Test), tablets, orally under moderate fat conditions on Day 1 in second intervention period. There will be at least 7 days wash out period between each dose of study intervention.
Part 1: Treatment BAEXPERIMENTALParticipants will receive a single dose of GSK3640254 200 mg (Treatment B- Test), tablets, orally under moderate fat conditions on Day 1 in first intervention period; followed by GSK3640254 200 mg (Treatment A- Reference), capsules, orally under moderate fat conditions on Day 1 in second intervention period. There will be at least 7 days wash out period between each dose of study intervention.
Part 2: Treatment CDEEXPERIMENTALParticipants will receive a single dose of GSK3640254 200 mg (Treatment C- Test), tablets, orally under moderate fat conditions on Day 1 in first intervention period; followed by GSK3640254 200 mg (Treatment D- Reference), tablets, orally under fasted conditions on Day 1 in second intervention period; followed by GSK3640254 200 mg (Treatment E- Test), tablets, orally under high fat conditions on Day 1 in third intervention period. There will be at least 7 days wash out period between each dose of study intervention.
Part 2: Treatment DECEXPERIMENTALParticipants will receive a single dose of GSK3640254 200 mg (Treatment D- Reference), tablets, orally under fasted conditions on Day 1 in first intervention period; followed by GSK3640254 200 mg (Treatment E- Test), tablets, orally under high fat conditions on Day 1 in second intervention period; followed by GSK3640254 200 mg (Treatment C- Test), tablets, orally under moderate fat conditions on Day 1 in third intervention period. There will be at least 7 days wash out period between each dose of study intervention.
Part 2: Treatment ECDEXPERIMENTALParticipants will receive a single dose of GSK3640254 200 mg (Treatment E- Test), tablets, orally under high fat conditions on Day 1 in first intervention period; followed by GSK3640254 200 mg (Treatment C- Test), tablets, orally under moderate fat conditions on Day 1 in second intervention period; followed by GSK3640254 200 mg (Treatment D- Reference), tablets, orally under fasted conditions on Day 1 in third intervention period. There will be at least 7 days wash out period between each dose of study intervention.
Portia followed by Portia co-administered with GSK3640254EXPERIMENTALSubjects will be administered Portia (0.03 mg EE/0.15 mg LNG) once daily on Days -3 to -1 during run-in period and on Days 1 to 10 in treatment period A. Subjects will then receive Portia (0.03 mg EE/0.15 mg LNG) co-administered with GSK3640254 200 mg once daily on Days 11 to 21 in treatment period B.
DTG followed by GSK3640254 followed by DTG+GSK3640254EXPERIMENTALSubjects will receive DTG 50 mg QD on Days 1 through 5 in Period 1 followed by a wash-out period of 4 days. Subjects will then receive GSK3640254 200 mg QD on Days 1 through 7 in Period 2 followed by co-administration of DTG 50 mg QD with GSK3640254 200 mg QD on Days 1 through 7 in Period 3.
Interventions
NameTypeDescription
GSK3640254DRUGGSK3640254 will be available with dosing strengths of 5 mg, 20 mg, and 100 mg to be administered as an oral capsule along with 240 mL of water.
Placebo matching GSK3640254 Mesylate saltDRUGPlacebo to match GSK3640254 Mesylate salt will be given as an oral capsule along with 240 mL of water
DTGDRUGDTG will be administered via oral route.
GSK3640254/DTGDRUGGSK3640254/DTG will be administered via oral route.
GSK3640254 200 mgDRUGGSK3640254 will be available as oral tablets at unit dose strength of 100 mg.
Caffeine 200 mgDRUGCaffeine will be available as oral tablets at unit dose strength of 200 mg.
Metoprolol 100 mgDRUGMetoprolol will be available as oral tablets at unit dose strength of 100 mg.
Montelukast 10 mgDRUGMontelukast will be available as oral tablets at unit dose strength of 10 mg.
Flurbiprofen 100 mgDRUGFlurbiprofen will be available as oral tablets at unit dose strength of 100 mg.
Omeprazole 40 mgDRUGOmeprazole will be available as oral capsules at unit dose strength of 40 mg.
Midazolam 5 mg (2.5 mL)DRUGMidazolam will be available as syrup for oral administration at unit dose strength of 2 milligram per milliliter (mg/mL).
Digoxin 0.25 mgDRUGDigoxin will be available as oral tablet at unit dose strength of 0.25 mg.
Pravastatin 40 mgDRUGPravastatin will be available as oral tablet at unit dose strength of 40 mg.
PlaceboDRUGPlacebo will be administered.
MoxifloxacinDRUGMoxifloxacin will be administered.
Darunavir/Ritonavir (DRV/RTV)DRUGDRV/RTV will be available as oral tablets.
Etravirine (ETR)DRUGETR will be available as oral tablets.
GSK3640254 Oral tabletDRUGGSK3640254 will be available as white film-coated round tablets to be administered via oral route with meal in the morning with 240 milliliter (mL) of water at room temperature.
[14C]-GSK3640254 intravenous infusionDRUG\[14C\]-GSK3640254 will be available as clear, colorless solution free from visible particulates to be administered via the IV route.
[14C]-GSK3640254 powderDRUG\[14C\]-GSK3640254 will be available as white powder to be reconstituted into a suspension with 25 mL of vehicle before dosing so as to administer 85 mg dose with meal in the morning.
GSK3640254 TabletDRUGGSK3640254 tablets will contain mesylate salt with a unit dose of 100 mg (2x100 mg) and will be administered orally.
GSK3640254 CapsuleDRUGGSK3640254 capsules will contain mesylate salt with a unit dose of 100 mg (2x100 mg) and will be administered orally.
PortiaDRUGPortia will be available in the form of tablets containing 0.03 mg ethinyl estradiol and 0.15 mg levonorgestrel.
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Eligibility Criteria
Age Range18 Years — 65 Years
SexALL
Healthy VolunteersNo
Study Sites23

Inclusion Criteria: * Subject must be 18 to 65 years of age inclusive, at the time of signing the informed consent. * Subjects who are healthy (other than HIV infection) as determined by the Investigator or medically qualified designee based on a medical evaluation including medical history, labora...

Countries:United StatesFranceGermanyItalySouth AfricaSpainUnited Kingdom
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