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RLYB116

Phase 1

Hematologic Diseases | Small molecule | Hematology |Rallybio Corporation|Last Updated: Feb 27, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment16

FDA Designations

No designations recorded

Clinical trial landscape

RLYB116 · 1 trial · 2 indications

Phase 1 1
NCT06797375Safety, Tolerability, Pharmacokinetics and Pharmacodynamics Study of RLYB116 in Healthy ParticipantsHematologic Diseases
COMPLETED16 Analytics
PHASE1COMPLETED
Safety, Tolerability, Pharmacokinetics and Pharmacodynamics Study of RLYB116 in Healthy Participants
Hematologic DiseasesUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of participants with treatment related adverse events as defined by CTCAE 5.0.
From baseline to Day 1, 2, 3, 4, 5, 8, 9, 15, 16, 22, 23, 29, 30, 32, 33, 36, 43, 57, 71, 99

Secondary Endpoints

Inhibition of complement activation measured by free/total C5 concentrations and hemolytic activity
Day 1, 2, 8, 15, 29, 20, 32, 33, 43, 57, 71, 99
Anti-RLYB116 antibodies measured in serum
Day 1, 29, 99
Exposure to RLYB116 as measured in serum
Day 1, 2, 3, 4, 5, 8, 15, 29, 53, 57, 71, 99
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
RLYB116 Dose 1EXPERIMENTALRLYB116 for Injection Dose 1, weekly for 5 weeks
RLYB116 Dose 2EXPERIMENTALRLYB116 for Injection Dose 2, weekly for 5 weeks
Placebo for InjectionPLACEBO_COMPARATORSodium chloride injection, 0.9% saline (for both RLYB116 doses), weekly for 5 weeks

Interventions

NameTypeDescription
RLYB116 for InjectionDRUGRLYB116 is a small protein composed of an Affibody® Z-domain that binds with high affinity to C5, inhibiting terminal complement activation, and an albumin binding domain (ABD) that extends the effective plasma half-life of the protein by targeting serum albumin.
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Eligibility Criteria

Age Range18 Years to 55 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: 1. Male and female participants, 18 to 55 years of age. 2. Able to provide written informed consent. 3. Body mass index (BMI) of 18.0 to 32.0 kg/m2. 4. Must have been vaccinated against N. meningitidis and S. pneumoniae with approved vaccine according to product label. All parti...

Countries:Australia
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Frequently asked questions about RLYB116

What is RLYB116 used for?

RLYB116 is an investigational small molecule being developed for hematologic diseases. It is currently in Phase 1 clinical development, meaning it has not been approved by regulatory authorities and is still being studied for safety and efficacy in clinical trials.

Who makes RLYB116?

RLYB116 is being developed by Rallybio Corporation, a biopharmaceutical company. Rallybio's stock trades under the ticker symbol RLYB on the NASDAQ exchange.

What phase is RLYB116 in?

RLYB116 is in Phase 1 clinical development. A Phase 1 study of RLYB116 has been completed, and the drug remains investigational. It is not yet approved for any use, and further clinical trials would be needed to establish its safety and efficacy.

What clinical trials is RLYB116 in?

RLYB116 has one completed Phase 1 clinical trial, identified as NCT06797375. This study evaluated the safety, tolerability, pharmacokinetics, and pharmacodynamics of RLYB116 in healthy participants. The trial enrolled 16 participants and was conducted in Australia.

Is RLYB116 FDA approved?

No, RLYB116 is not FDA approved. It is an investigational drug currently in Phase 1 clinical development. The completed Phase 1 trial was a safety and tolerability study in healthy volunteers, and the drug has not yet progressed to later-stage trials or regulatory approval.