Recent Updates
Recently added Catalysts

JNJ-55375515

Phase 1

Undisclosed | Small molecule | Other |Johnson & Johnson|Trials Updated: Apr 27, 2025

JNJ-55375515 development status

Highest phase Phase 1
Registered trials 2 across 1 sponsor since Dec 2015

JNJ-55375515 target and mechanism

ModalitySmall molecule

Also known as JNJ-55375515 Dose Level 1

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials2
Total Enrollment217

FDA Designations

No designations recorded

JNJ-55375515 clinical trials

JNJ-55375515 · 2 trials · 1 indication

Phase 1 2
NCT03405441A Study to Investigate Safety and Tolerability, Pharmacokinetics and Pharmacodynamics of JNJ-55375515 in Healthy Male ParticipantsHealthy
COMPLETED42 Analytics
NCT02623491Study to Investigate the Safety, Tolerability, and Pharmacokinetics of JNJ-55375515 in Healthy ParticipantsHealthy
COMPLETED175 Analytics
PHASE1COMPLETED
A Study to Investigate Safety and Tolerability, Pharmacokinetics and Pharmacodynamics of JNJ-55375515 in Healthy Male Participants
HealthyUnlock trial analytics
PHASE1COMPLETED
Study to Investigate the Safety, Tolerability, and Pharmacokinetics of JNJ-55375515 in Healthy Participants
HealthyUnlock trial analytics

Study Endpoints

Primary Endpoints

Part 1 (Day-Time Dosing): Number of Participants with Adverse Events (AEs) as a Measure of Safety and Tolerability
Up to Week 8

An adverse event (AE) is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship.

Part 2 (Night-Time Dosing): Number of Participants with AEs as a Measure of Safety and Tolerability
Up to Week 9

An adverse event (AE) is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship.

Number of Participants with Adverse Events
Up to Day 7 after discharge

An adverse event is any untoward medical event that occurs in a participant administered an investigational product, and it does not necessarily indicate only events with clear causal relationship with the relevant investigational product.

Part 1: Time to Reach Maximum Observed Plasma Concentration (Tmax)
Up to Day 5

The Tmax is defined as actual sampling time to reach maximum observed concentration.

Part 1: Area Under the Plasma Concentration-Time Curve From Time Zero to Time 't' (AUC[0-t])
Up to Day 5

The AUC(0-t) is the area under the plasma concentration-time curve from time zero to any time 't'.

Part 1: Elimination Half-Life (t1/2)
Up to Day 5

The elimination half-life (t1/2) is the time measured for the plasma concentration to decrease by 1 half to its original concentration. It is associated with the terminal slope of the semi logarithmic drug concentration-time curve, and is calculated as 0.693/lambda(z).

Part 1: Maximum Observed Plasma Concentration (Cmax)
Up to Day 5

The Cmax is the maximum observed concentration.

Part 2: Time to Reach Maximum Observed Plasma Concentration (Tmax)
Up to Day 15

The Tmax is defined as actual sampling time to reach maximum observed concentration.

Part 2: Area Under the Plasma Concentration-Time Curve From Time Zero to Time 't' (AUC[0-t])
Up to Day 15

The AUC(0-t) is the area under the plasma concentration-time curve from time zero to any time 't'.

Part 2: Elimination Half-Life (t1/2)
Up to Day 15

The elimination half-life (t1/2) is the time measured for the plasma concentration to decrease by 1 half to its original concentration. It is associated with the terminal slope of the semi logarithmic drug concentration-time curve, and is calculated as 0.693/lambda(z).

Part 2: Maximum Observed Plasma Concentration (Cmax)
Up to Day 15

The Cmax is the maximum observed concentration.

Secondary Endpoints

Slow Wave Activity Recorded by the Electroencephalogram (EEG)
Pre-dose, 1 hour (h), 2h, and 4h post dose on Day 1
Part 1: PD of JNJ-55375515 as Assessed by Heart Rate Variability (HRV)
Pre-dose (Day 1) up to 24 hours post dose
Part 1: Saccadic Reaction Time (RT) as Measured by Saccadic Eye Movements
Pre-dose, 1 h, 2h, and 4h post dose on Day 1
Unlock Study Endpoints

Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelCROSSOVER
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1 (Panel 1): JNJ-55375515 and placeboEXPERIMENTALParticipants will receive dose level (DL) 1 of JNJ-55375515 (starting dose) or placebo on Day 1 of period 1 based on their randomization sequence 1, 2 or 3. Dose of the study medication will be escalated to DL 3 (period 2) and a maximum of DL 5 (period 3) based on the safety and tolerability profile and pharmacodynamic (PD) profile assessed at the preceding dose level. A wash-out period of at least 10 days will be maintained between study drug administrations.
Part 1 (Panel 2): JNJ-55375515 and placeboEXPERIMENTALParticipants will receive DL 2 of JNJ-55375515 (starting dose) or placebo on Day 1 of period 1 based on their randomization sequence 1, 2 or 3. Dose of the study medication will be escalated to DL 4 (period 2) and a maximum of DL 6 (period 3) based on the safety and tolerability profile and PD profile assessed at the preceding dose level. A wash-out period of at least 10 days will be maintained between study drug administrations.
Part 2: JNJ-55375515 and placeboEXPERIMENTALParticipants will randomly be assigned to one of four treatment sequences 1, 2, 3 or 4. In the first 3 sequences, participants will receive 2 doses of JNJ-55375515 and placebo. Participants assigned to sequence 4 will receive placebo only in all periods. 3 dose levels will be tested in Part 2 based on Part 1 and will not exceed those evaluated in Part 1. A wash-out period of at least 10 days will be maintained between study drug administrations in period 1, 2, 3 and 4. In period 4 (open-label pharmacokinetic (PK) assessment period) participants will be randomly assigned to one of two dose levels tested in periods 1 to 3.
Part 1: Single Ascending Dose (SAD)EXPERIMENTALParticipants will receive 0.75 milligrams (mg) of JNJ-55375515 (starting dose) or Placebo on Day 1. Dose of the study medication will be escalated sequentially up to a maximum of 200 mg.
Part 2: Multiple Ascending Dose (MAD)EXPERIMENTALParticipants will receive JNJ-55375515 (at doses determined based on the data from the SAD part) or Placebo from Day 1 to 10.

Interventions

NameTypeDescription
JNJ-55375515 Dose Level 1DRUGParticipants will receive JNJ-55375515 orally at a Dose level 1 in Part 1 of study.
JNJ-55375515 Dose Level 2DRUGParticipants will receive JNJ-55375515 orally at a Dose level 2 in Part 1 of study.
JNJ-55375515 Dose Level 3DRUGParticipants will receive JNJ-55375515 orally at a Dose level 3 in Part 1 of study.
JNJ-55375515 Dose Level 4DRUGParticipants will receive JNJ-55375515 orally at a Dose level 4 in Part 1 of study.
JNJ-55375515 Dose Level 5DRUGParticipants will receive JNJ-55375515 orally at a Dose level 5 in Part 1 of study.
JNJ-55375515 Dose Level 6DRUGParticipants will receive JNJ-55375515 orally at a Dose level 6 in Part 1 of study.
PlaceboDRUGAll participants will receive matching placebo orally in Part 1 and Part 2 of the study.
JNJ-55375515DRUGParticipants will receive JNJ-55375515 as per the assigned treatment in Part 2.
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to 54 Years
SexMALE
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Body Mass Index (BMI) between 18 and 30 kilogram / square meter (kg/m\^2) inclusive (BMI=weight/height\^2) * Participant must be healthy based on clinical laboratory tests performed at screening. If the results of the serum chemistry panel, hematology, coagulation or urinalysi...

Countries:NetherlandsBelgium
Unlock Eligibility Criteria

Frequently asked questions about JNJ-55375515

What is JNJ-55375515?

JNJ-55375515 is an investigational small molecule developed by Johnson & Johnson. It has been studied in Phase 1 clinical trials in healthy participants to evaluate its safety, tolerability, pharmacokinetics, and pharmacodynamics. The specific therapeutic indication for JNJ-55375515 has not been disclosed.

Who makes JNJ-55375515?

JNJ-55375515 is developed by Johnson & Johnson, which trades on the New York Stock Exchange under the ticker symbol JNJ. Johnson & Johnson is the sponsor of the clinical trials evaluating this investigational small molecule.

What phase is JNJ-55375515 in?

JNJ-55375515 is in Phase 1 clinical development. Two Phase 1 trials have been completed, and no active trials are currently listed. The drug remains investigational and has not been approved by the FDA for any indication.

What clinical trials is JNJ-55375515 in?

JNJ-55375515 has been evaluated in two completed Phase 1 trials. NCT03405441 studied safety, tolerability, pharmacokinetics, and pharmacodynamics in 42 healthy male participants in the Netherlands. NCT02623491 studied safety, tolerability, and pharmacokinetics in 175 healthy participants in Belgium. Both trials are completed.

Is JNJ-55375515 the same as JNJ-55375515 Dose Level 1?

JNJ-55375515 Dose Level 1 is an alternative name for JNJ-55375515. Both refer to the same investigational small molecule developed by Johnson & Johnson. The dose level designation distinguishes a specific dose cohort within the clinical program.