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BIIB145

Phase 1

Healthy Volunteer | Small molecule | Other |Biogen Inc.|Last Updated: Feb 6, 2026

Target and mechanism

Molecular targetBTK
Target classProtein
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials1
Total Enrollment104

FDA Designations

No designations recorded

Clinical trial landscape

BIIB145 · 1 trial · 1 indication

Phase 1 1
NCT07225517A Study to Learn More About the Safety of BIIB145 and How it is Processed in the Body of Healthy Adult ParticipantsHealthy Volunteer
RECRUITING104 Analytics
PHASE1RECRUITING
A Study to Learn More About the Safety of BIIB145 and How it is Processed in the Body of Healthy Adult Participants
Healthy VolunteerUnlock trial analytics

Study Endpoints

Primary Endpoints

Parts A, B, and C: Number of Participants With Treatment Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs)
Parts A and Part B: Up to Day 14; Part C: Up to Day 28
Parts A, B, and C: Number of Participants With Clinical Laboratory Abnormalities
Parts A and Part B: Up to Day 14; Part C: Up to Day 28
Parts A, B, and C: Number of Participants With Clinically Relevant Abnormalities in Vital Sign Parameters
Parts A and Part B: Up to Day 14; Part C: Up to Day 28
Part C: Number of Participants With Columbia Suicide Severity Rating Scale (C-SSRS) Events
Part C: Up to Day 28
Parts A, B, and C: Number of Participants With Potentially Clinically Relevant Abnormalities in 12-lead Electrocardiogram (ECG) Parameters
Parts A and B: Up to Day 14; Part C: Up to Day 28

Secondary Endpoints

Parts A, B, and C: Area Under the Concentration-Time Curve (AUC) of BIIB145
Pre-dose and at multiple timepoints post-dose (Parts A and B: Up to Day 4; Part C: Up to Day 17)
Parts A, B, and C: Maximum Observed Concentration (Cmax) of BIIB145
Pre-dose and at multiple timepoints post-dose (Parts A and B: Up to Day 4; Part C: Up to Day 17)
Parts A, B, and C: Time to Maximum Observed Concentration (Tmax) of BIIB145
Pre-dose and at multiple timepoints post-dose (Parts A and B: Up to Day 4; Part C: Up to Day 17)
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part A [Single Ascending Dose (SAD)]: BIIB145 Cohort 1AEXPERIMENTALParticipants will receive Dose A of BIIB145 or a matching placebo on Day 1 in a fasted state.
Part A (SAD): BIIB145 Cohort 2AEXPERIMENTALParticipants will receive Dose B of BIIB145 or a matching placebo on Day 1 in a fasted state.
Part A (SAD): BIIB145 Cohort 3AEXPERIMENTALParticipants will receive Dose C of BIIB145 or a matching placebo on Day 1 in a fasted state.
Part A (SAD): BIIB145 Cohort 4AEXPERIMENTALParticipants will receive Dose D of BIIB145 or a matching placebo on Day 1 in a fasted state.
Part A (SAD): BIIB145 Cohort 5AEXPERIMENTALParticipants will receive Dose E of BIIB145 or a matching placebo on Day 1 in a fasted state.
Part A (SAD): BIIB145 Cohort 6AEXPERIMENTALParticipants will receive Dose F of BIIB145 or a matching placebo on Day 1 in a fasted state.
Part A (SAD): BIIB145 Cohort 7AEXPERIMENTALParticipants will receive Dose G of BIIB145 or a matching placebo on Day 1 in a fasted state.
Part B [Food Effect]: BIIB145 Cohort 1BEXPERIMENTALParticipants will receive BIIB145 on Day 1 in the fasted state, followed by the fed state in the first sequence, and vice versa in the second sequence. A washout period of 7 days will be maintained between the two sequences. Dose will be determined based on safety and PK data of SAD Cohort 6A as well as safety, PK and pharmacodynamics (PD) data from previous cohorts.
Part C [Multiple Ascending Dose (MAD)]: BIIB145 Cohort 1CEXPERIMENTALParticipants will receive Dose B of BIIB145 or a matching placebo administered orally once daily for 14 days in a fasted state.
Part C [Multiple Ascending Dose (MAD)]: BIIB145 Cohort 2CEXPERIMENTALParticipants will receive Dose C of BIIB145 or a matching placebo administered orally once daily for 14 days in a fasted state.
Part C [Multiple Ascending Dose (MAD)]: BIIB145 Cohort 3CEXPERIMENTALParticipants will receive Dose H of BIIB145 or a matching placebo administered orally once daily for 14 days in a fasted state.
Part C [Multiple Ascending Dose (MAD)]: BIIB145 Cohort 4CEXPERIMENTALParticipants will receive Dose F of BIIB145 or a matching placebo administered orally once daily for 14 days in a fasted state.

Interventions

NameTypeDescription
BIIB145DRUGAdministered orally
PlaceboDRUGAdministered orally
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Eligibility Criteria

Age Range18 Years to 55 Years
SexALL
Healthy VolunteersYes
Study Sites1

Key Inclusion Criteria: * Have a body mass index (BMI) between 18 and 32 kilograms per square metre (kg/m\^2), inclusive, and a total body weight \> 50 kilograms (kg) at Screening and Check-In. * Must be in good health as determined by the Investigator, based on medical history and Screening evalua...

Countries:United States
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Recent Changes (Last 90 Days)

LOWMay 26, 2026NCT07225517primaryCompletionDate: changed
LOWMay 24, 2026NCT07225517studyFirstPostDate: changed

Frequently asked questions about BIIB145

What is BIIB145 used for?

BIIB145 is an investigational small molecule being studied in healthy volunteers. It is currently in Phase 1 clinical development, with a trial evaluating its safety and how it is processed in the body of healthy adult participants. It is not approved for any indication.

What does BIIB145 target?

BIIB145 targets BTK, a protein involved in cellular signaling. As a small molecule, it is designed to interact with this target. However, its specific mechanism of action and therapeutic potential are still under investigation in early-stage clinical trials.

Who makes BIIB145?

BIIB145 is being developed by Biogen Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol BIIB. The company is conducting a Phase 1 clinical trial to evaluate the drug's safety and pharmacokinetics in healthy volunteers.

What phase is BIIB145 in?

BIIB145 is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by regulatory authorities. The ongoing Phase 1 trial is recruiting participants to assess the safety and processing of BIIB145 in the body.

What clinical trials is BIIB145 in?

BIIB145 is being studied in one Phase 1 clinical trial, identified as NCT07225517. This randomized, double-blind, controlled study is recruiting 104 healthy adult participants in the United States to evaluate the safety and how BIIB145 is processed in the body.

Is BIIB145 the same as any other drug?

No alternative names for BIIB145 have been disclosed. It is identified solely by its development code, BIIB145, in the context of its ongoing clinical trial and development by Biogen Inc.