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Brelovitug

Phase 3

Chronic Hepatitis D Infection | Small molecule | Infectious Disease |Mirum Pharmaceuticals, Inc.|Last Updated: Aug 25, 2026

Target and mechanism

ModalitySmall molecule

Also known as Brelovitug (BJT-778)

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLEDDMC
Total Trials3
Total Enrollment402

FDA Designations

No designations recorded

Clinical trial landscape

Brelovitug · 4 trials · 2 indications

Phase 3 2Phase 2 2
NCT07298330A Trial Evaluating Brelovitug vs Delayed Treatment for the Treatment of Chronic Hepatitis Delta Infection (AZURE-4)Chronic Hepatitis D Infection
ACTIVE NOT_RECRUITING80 Analytics
NCT07200908A Trial Evaluating Brelovitug (BJT-778) vs Bulevirtide for the Treatment of Chronic Hepatitis Delta Infection (AZURE-2)Chronic Hepatitis D Infection
RECRUITING172 Analytics
PHASE3ACTIVE NOT_RECRUITING
A Trial Evaluating Brelovitug vs Delayed Treatment for the Treatment of Chronic Hepatitis Delta Infection (AZURE-4)
Chronic Hepatitis D InfectionUnlock trial analytics
PHASE3RECRUITING
A Trial Evaluating Brelovitug (BJT-778) vs Bulevirtide for the Treatment of Chronic Hepatitis Delta Infection (AZURE-2)
Chronic Hepatitis D InfectionUnlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of participants with a composite endpoint of virologic response and ALT normalization at Week 24 in brelovitug arms compared to response at Week 12 of delayed-treatment arm
Week 24

The composite endpoint is defined as virologic response (HDV RNA ≥2 log10 IU/mL decrease from Baseline or undetectable HDV RNA (\< the lower limit of quantification \[LLOQ\], target not detected \[TND\]) and ALT normalization (decrease in ALT from baseline to ≤ upper limit of normal \[ULN\])

Percentage of participants with a composite endpoint of virologic response and ALT normalization
Week 48

The composite endpoint is defined as virologic response (undetectable HDV RNA, \< the lower limit of quantification \[LLOQ\], target not detected \[TND\]) and ALT normalization (decrease in ALT from baseline to ≤ upper limit of normal \[ULN\])

Proportion of participants with undetectable HDV RNA (<LLOQ Target not detected [TND])
Week 24

The proportion of participants with undetectable HDV RNA (\<LLOQ, TND) at Week 24

Percentage of participants with a composite endpoint
Week 24

Achieving composite endpoint defined as virologic response (undetectable HDV RNA or decline in HDV RNA ≥2 log10 IU/mL) and ALT normalization

Secondary Endpoints

Percentage of participants with treatment-emergent adverse events (TEAEs)
Up to 96 weeks
Percentage of participants who discontinue treatment due to an adverse event (AE)
Up to 96 weeks
Percentage of participants with HDV RNA ≥ 2 log10 IU/mL decline from baseline or TND
Up to 96 Weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Brelovitug 300 mgEXPERIMENTALParticipants will receive treatment with brelovitug 300 mg once weekly for 96 weeks
Brelovitug 900 mgEXPERIMENTALParticipants will receive treatment with brelovitug 900 mg once every 4 weeks with a loading dose at Week 2 for 96 weeks
Delayed treatment with brelovitug 300 mgACTIVE_COMPARATORParticipants will have 12 weeks of delayed treatment followed by brelovitug 300 mg once weekly for 96 weeks
BrelovitugEXPERIMENTALParticipants will receive treatment with brelovitug 300 mg once weekly for 96 weeks
Bulevirtide for 48 weeks followed by brelovitug for 48 weeksACTIVE_COMPARATORParticipants will receive bulevirtide 2 mg subcutaneously once daily for 48 weeks, followed by brelovitug 300 mg subcutaneously once weekly for the next 48 weeks.
Immediate Switch to BrelovitugEXPERIMENTALParticipants will switch to brelovitug 300 mg once weekly for 96 weeks.
Delayed Switch from Bulevirtide to BrelovitugEXPERIMENTALParticipants will continue bulevirtide once daily and then switch to brelovitug 300 mg once weekly for 72 weeks.
Brelovitug 300mgEXPERIMENTALDose - brelovitug 300 mg Frequency- once weekly
Brelovitug 900mgEXPERIMENTALDose - brelovitug 900 mg Frequency- once every 4 weeks
Delayed Treatment with brelovitug 300mgACTIVE_COMPARATORDose - brelovitug 300 mg Frequency- 24 weeks of delayed treatment, then once weekly

Interventions

NameTypeDescription
Brelovitug 300 mgDRUGRoute of administration- Subcutaneous Injection
Brelovitug 900 mgDRUGRoute of administration- Subcutaneous Injection
Delayed Treatment with Brelovitug 300mgDRUGRoute of administration- Subcutaneous Injection
Bulevirtide 2 mg and Brelovitug - 300 mgDRUGRoute of Administration- Subcutaneous Injection
Brelovitug (BJT-778)DRUGBrelovitug (BJT-778), 300 mg administered subcutaneously once weekly for 96 weeks.
BulevirtideDRUGBulevirtide - once daily. Brelovitug (BJT-778) - 300 mg once weekly for 72 weeks following bulevirtide.
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Eligibility Criteria

Age Range18 Years to 99 Years
SexALL
Healthy VolunteersNo
Study Sites27

Inclusion Criteria: 1. Willing and able to provide written informed consent 2. Chronic HDV infection 3. HDV RNA \>500 IU/mL at Screening 4. ALT \>ULN at Screening 5. Willing to take or already taking HBV nucleos(t)ide therapy. Exclusion Criteria: 1. Pregnant or nursing females 2. Unwilling to com...

Countries:United StatesBelgiumBulgariaGeorgiaHungaryIsraelPakistanTaiwanUkraineUzbekistanAustriaCzechiaFranceGermanyItalyRomaniaSpainSwedenSwitzerlandUnited KingdomAustraliaCanadaMoldovaNew ZealandSerbiaTurkey (Türkiye)
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Recent Changes (Last 90 Days)

LOWAug 25, 2026NCT07200908lastUpdatePostDate: changed
LOWAug 25, 2026NCT07454837lastUpdatePostDate: changed
LOWAug 25, 2026NCT07200908lastUpdatePostDate: changed
LOWAug 25, 2026NCT07454837lastUpdatePostDate: changed
MEDIUMJun 29, 2026NCT07298330Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWJun 29, 2026NCT07454837lastUpdatePostDate: changed
MEDIUMJun 29, 2026NCT07298330Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWJun 29, 2026NCT07454837lastUpdatePostDate: changed
LOWJun 16, 2026NCT07200908lastUpdatePostDate: changed
LOWJun 16, 2026NCT07454837lastUpdatePostDate: changed
LOWJun 16, 2026NCT07200908lastUpdatePostDate: changed
LOWJun 16, 2026NCT07454837lastUpdatePostDate: changed
LOWJun 16, 2026NCT07200908lastUpdatePostDate: changed
LOWJun 16, 2026NCT07454837lastUpdatePostDate: changed
LOWJun 16, 2026NCT07200908lastUpdatePostDate: changed
LOWJun 16, 2026NCT07454837lastUpdatePostDate: changed

Frequently asked questions about Brelovitug

What is Brelovitug used for?

Brelovitug is an investigational small molecule being developed for the treatment of chronic hepatitis D, also known as chronic hepatitis D infection. It is currently in clinical development and has not been approved by regulatory authorities.

Who is developing Brelovitug?

Brelovitug is being developed by Mirum Pharmaceuticals, Inc., a biopharmaceutical company traded on the Nasdaq under the ticker symbol MIRM. The drug is also known as BJT-778 and is being studied in multiple clinical trials for chronic hepatitis D.

What phase is Brelovitug in?

Brelovitug is in Phase 2 and Phase 3 clinical trials for chronic hepatitis D infection. It is an investigational drug, meaning it has not yet received regulatory approval and is still being evaluated for safety and efficacy in clinical studies.

What clinical trials is Brelovitug in?

Brelovitug is being studied in several trials, including NCT06907290 (Phase 2, comparing BJT-778 to delayed treatment), NCT07200908 (Phase 3, AZURE-2, comparing Brelovitug to bulevirtide), NCT07298330 (Phase 3, AZURE-4, comparing Brelovitug to delayed treatment), and NCT07454837 (Phase 2, evaluating switching to Brelovitug in patients receiving bulevirtide).

Is Brelovitug the same as BJT-778?

Yes, Brelovitug is also known as BJT-778. Clinical trial records refer to the drug as both Brelovitug and BJT-778, and it is being evaluated for the treatment of chronic hepatitis D infection.

What is the AZURE-2 trial for Brelovitug?

AZURE-2 is a Phase 3 clinical trial (NCT07200908) comparing Brelovitug (BJT-778) to bulevirtide for the treatment of chronic hepatitis D infection. The trial is recruiting participants in multiple European countries and Uzbekistan.