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ALG-097558

Phase 1

COVID 19 | Small molecule | Infectious Disease |Aligos Therapeutics, Inc.|Last Updated: Aug 25, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment12

FDA Designations

No designations recorded

Clinical trial landscape

ALG-097558 · 3 trials · 2 indications

Phase 1 3
NCT06698549A Study to Evaluate the Pharmacokinetics, Safety and Tolerability of ALG-097558 in Subjects With Renal Impairment and in Healthy Subjects With Normal Renal FunctionCOVID 19
COMPLETED12 Analytics
NCT06568861A Study to Evaluate the Pharmacokinetics, Safety and Tolerability of ALG-097558 in Subjects With Hepatic Impairment and in Healthy Subjects With Normal Hepatic FunctionCOVID-19
COMPLETED16 Analytics
NCT05840952A First-in-Human Multi-Part Phase 1 Study in Healthy Volunteers to Evaluate the Safety, Tolerability, Pharmacokinetics, and Drug-Drug Interaction Potential of Single and Multiple Doses of ALG-097558COVID-19
COMPLETED90 Analytics
PHASE1COMPLETED
A Study to Evaluate the Pharmacokinetics, Safety and Tolerability of ALG-097558 in Subjects With Renal Impairment and in Healthy Subjects With Normal Renal Function
COVID 19Unlock trial analytics
PHASE1COMPLETED
A Study to Evaluate the Pharmacokinetics, Safety and Tolerability of ALG-097558 in Subjects With Hepatic Impairment and in Healthy Subjects With Normal Hepatic Function
COVID-19Unlock trial analytics
PHASE1COMPLETED
A First-in-Human Multi-Part Phase 1 Study in Healthy Volunteers to Evaluate the Safety, Tolerability, Pharmacokinetics, and Drug-Drug Interaction Potential of Single and Multiple Doses of ALG-097558
COVID-19Unlock trial analytics

Study Endpoints

Primary Endpoints

Area Under the Concentration Time Curve [AUC]
AUC(0-12): Pre-dose (-0.75), 0.25, 0.5, 1, 2, 3, 4, 6, 8, and 12h post last dose on days 1 and 6; AUC(0-last): Predose (-0.75), 0.25, 0.5, 1, 2, 3, 4, 6, 8, and 12h post last dose on day 1 and 6, and additionally 14, 24, 36 and 48h on day 6 only

Pharmacokinetic parameters of ALG-097558 and metabolite ALG-097730 in plasma

Maximum Plasma Concentration [Cmax]
Pre-dose (-0.75), 0.25, 0.5, 1, 2, 3, 4, 6, 8, and 12 hours post last dose on day 1 ; Pre-dose (-0.75), 0.25, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 36, 48 hours post last dose on day 6

Pharmacokinetic parameters of ALG-097558 and metabolite ALG-097730 in plasma

Minimum Plasma Concentration [Cmin]
Pre-dose (-0.75 hours), 0.25, 0.5, 1, 2, 3, 4, 6, 8, and 12 hours post last dose on day 6 only

Pharmacokinetic parameters of ALG-097558 and metabolite ALG-097730 in plasma

C0 [Predose]
Pre-dose (-0.75 hours) up to Day 8

Pharmacokinetic parameters of ALG-097558 and metabolite ALG-097730 in plasma

Half-life [t1/2]
Pre-dose (-0.75 hours), 0.25, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 36, 48 hours post last dose on day 6 only

Pharmacokinetic parameters of ALG-097558 and metabolite ALG-097730 in plasma

Time to Maximum Plasma Concentration [Tmax]
Pre-dose (-0.75), 0.25, 0.5, 1, 2, 3, 4, 6, 8, and 12 hours post last dose on day 1 ; Pre-dose (-0.75), 0.25, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 36, 48 hours post last dose on day 6

Pharmacokinetic parameters of ALG-097558 and metabolite ALG-097730 in plasma

Apparent Clearance (CL/F)
Pre-dose (-0.75 hours), 0.25, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 36, 48 hours post last dose on day 6 only

Pharmacokinetic parameters of ALG-097558 and metabolite ALG-097730 in plasma

Apparent Volume of Distribution (V/F)
Pre-dose (-0.75 hours), 0.25, 0.5, 1, 2, 3, 4, 6, 8, 12, 24, 36, 48 hours post last dose on day 6 only

Pharmacokinetic parameters of ALG-097558 and metabolite ALG-097730 in plasma

Total Amount of Drug Excreted in Urine (Ae)
Collection intervals: 0-6, 6-12, 12-24, 24-36 and 36-48 hours after the last dose

Pharmacokinetic parameters of ALG-097558 and metabolite ALG-097730 in urine

Renal Clearance (CLr)
Collection intervals: 0-6, 6-12, 12-24, 24-36 and 36-48 hours after the last dose.

Pharmacokinetic parameters of ALG-097558 and metabolite ALG-097730 in urine

Incidence of Treatment-Emergent Adverse Events [Safety and Tolerability]
Up to 11 days for Part 1

The number and severity of treatment emergent adverse events as assessed by DAIDS v2.1

Secondary Endpoints

Incidence of Treatment-Emergent Adverse Events [Safety and Tolerability]
Up to 20 Days
Maximum plasma concentration [Cmax]
Predose (-0.75 hours) up to 19 days
Area under the concentration time curve [AUC]
Predose (-0.75 hours) up to 19 days
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Subjects with Severe Renal ImpairmentEXPERIMENTALSubjects with severe renal impairment will receive oral doses of 300 mg ALG-097558 twice daily (every 12 hours \[Q12H\]) for 6 days for 11 total doses.
Subjects with Normal Renal FunctionEXPERIMENTALSubjects with normal renal function will receive oral doses of 300 mg ALG-097558 twice daily (every 12 hours \[Q12H\]) for 6 days for 11 total doses.
Subjects with Mild Renal Impairment (Optional)EXPERIMENTALSubjects with mild renal impairment will receive oral doses of 300 mg ALG-097558 twice daily (every 12 hours \[Q12H\]) for 6 days for 11 total doses.
Subjects with Moderate Renal Impairment (Optional)EXPERIMENTALSubjects with moderate renal impairment will receive oral doses of 300 mg ALG-097558 twice daily (every 12 hours \[Q12H\]) for 6 days for 11 total doses.
Subjects with Moderate Hepatic Impairment (Child-Pughs Class B)EXPERIMENTALSubjects with moderate hepatic impairment will receive oral doses of 200 mg ALG-097558 twice daily (every 12 hours \[Q12H\]) for 6 days for 11 total doses.
Subjects with Normal Hepatic FunctionEXPERIMENTALDemographically matched subjects with normal hepatic function will receive oral doses of 200 mg ALG-097558 twice daily (every 12 hours \[Q12H\]) for 6 days for 11 total doses.
ALG-097558EXPERIMENTALOral doses of ALG-097558 in Healthy Volunteers, up to 20 doses over 10 days
PlaceboPLACEBO_COMPARATOROral doses of placebo in Healthy Volunteers, up to 20 doses over 10 days
ALG-097558 and MidazolamEXPERIMENTALOral doses of ALG-097558, up to 14 doses over 7 days and oral dose of Midazolam, up to 2 doses, over 2 days, in Healthy Volunteers
ALG-097558, Placebo, and, ItraconazoleEXPERIMENTALOral doses of placebo, up to 2 doses over 2 days, followed by ALG-097558, up to 2 doses over 2 days, and itraconazole up to 10 doses over 10 days, in Healthy Volunteers.
ALG-097558 and CarbamazepineEXPERIMENTALOral doses of ALG-097558, up to 2 doses over 2 days and oral doses of Carbamazepine, up to 30 doses, over 15 days, in Healthy Volunteers
ALG-097558 BioavailabilityEXPERIMENTALOral doses of ALG-097558, up to 3 doses over 3 days, both solution and tablet formulations dosed in fasted state, and tablet formulation dosed in fed state, in Healthy Volunteers

Interventions

NameTypeDescription
ALG-097558DRUGMultiple doses of ALG-097558 300 mg (3 x 100 mg tablets)
PlaceboDRUGsingle or multiple doses of placebo
MidazolamDRUGMultiple doses of Midazolam
ItraconazoleDRUGMultiple doses of Itraconazole
CarbamazepineDRUGMultiple doses of Carbamazepine
ALG-097558 in solution formulationDRUGALG-097558 in solution administered in fasted state
ALG-097558 in tablet formulationDRUGALG-097558 in tablet administered in fasted and fed state
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersYes
Study Sites3

Inclusion Criteria for All Subjects: 1. Male and Female between 18 and 75 years old 2. Body Mass Index (BMI) 17.5 to 40.0 kg/m\^2 and a total body weight \>50 kg (110 lb) 3. Female subjects must either be not of childbearing potential or if they are a woman of childbearing potential, they are only ...

Countries:United StatesUnited Kingdom
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Recent Changes (Last 90 Days)

MEDIUMAug 9, 2026NCT06698549TRIAL_REMOVED: changed
MEDIUMAug 9, 2026NCT06698549TRIAL_REMOVED: changed
MEDIUMAug 9, 2026NCT06698549TRIAL_REMOVED: changed
MEDIUMJun 26, 2026NCT06568861TRIAL_REMOVED: changed
MEDIUMJun 26, 2026NCT06698549TRIAL_REMOVED: changed
MEDIUMJun 26, 2026NCT06568861TRIAL_REMOVED: changed
MEDIUMJun 26, 2026NCT06698549TRIAL_REMOVED: changed
MEDIUMJun 26, 2026NCT06568861TRIAL_REMOVED: changed
MEDIUMJun 26, 2026NCT06698549TRIAL_REMOVED: changed

Frequently asked questions about ALG-097558

What is ALG-097558 used for?

ALG-097558 is an investigational small molecule being developed for COVID-19. It is currently in Phase 1 clinical development and has not been approved by regulatory authorities. The drug is being studied in healthy volunteers and in subjects with hepatic or renal impairment to evaluate its safety, tolerability, and pharmacokinetics.

Who makes ALG-097558?

ALG-097558 is being developed by Aligos Therapeutics, Inc., a biopharmaceutical company traded on NASDAQ under the ticker symbol ALGS. The company is conducting Phase 1 clinical trials of this investigational drug for the treatment of COVID-19.

What phase is ALG-097558 in?

ALG-097558 is in Phase 1 clinical development. Three Phase 1 studies have been completed, including a first-in-human study in healthy volunteers, a hepatic impairment study, and a renal impairment study. The drug is investigational and has not received FDA approval.

What clinical trials is ALG-097558 in?

ALG-097558 has been studied in three completed Phase 1 trials. NCT05840952 evaluated safety, tolerability, pharmacokinetics, and drug-drug interactions in 90 healthy volunteers in the United Kingdom. NCT06568861 assessed pharmacokinetics in 16 subjects with hepatic impairment in the United States. NCT06698549 evaluated pharmacokinetics in 12 subjects with renal impairment in the United States.

Is ALG-097558 FDA approved?

No, ALG-097558 is not FDA approved. It is an investigational drug currently in Phase 1 clinical development for COVID-19. All completed trials have been early-stage studies focused on safety, tolerability, and pharmacokinetics in healthy volunteers and special populations.