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VH-184 + VH-499


Developer(s)

ViiV Healthcare

Originator
https://viivhealthcare.com/

Drug structure

Placeholder

Placeholder


Drug information

Associated long-acting platforms

not disclosed

Administration route

Subcutaneous, Intramuscular

Therapeutic area(s)

HIV

Use case(s)

Treatment

Use of drug

Ease of administration

Administered by a nurse
Administered by a specialty health worker

Frequency of administration

Every 6 months

User acceptance

Not provided

Dosage

Available dose and strength

Not established for the regimen. VH-499: single IM or SC doses of 100 to 1,200 mg studied in phase I. VH-184: LA formulations A and B (and C, SC) under evaluation

Maximum dose

VH-499: 1,200 mg single injection (phase I). VH-184: not publicly reported.

Recommended dosing regimen

Not provided

Additional comments

Twice-yearly target based on population PK simulations (VH-184 formulation B, Q6M) and flat PK after single VH-499 injections. Dosing will be defined in phase IIb.

Dosage link(s)

Not provided


Drug information

Drug's link(s)

Not provided

Generic name

VH-184 and VH-499 (fremocapavir)

Brand name

investigational

Compound type

Small molecule

Drug class/category

3rd gen. integrase strand transfer inhibitor (INSTI) + capsid inhibitor (CI)

Summary

Investigational, potentially twice-yearly, complete long-acting injectable regimen pairing ViiV Healthcare's third-generation INSTI VH-184 with its capsid inhibitor VH-499 (fremocapavir). Both agents are being developed individually as injectables; ViiV describes VH-184 and VH-499 as potential components of future ultra long-acting treatment regimens, and states that the phase I data will inform its plans for a first INSTI-based twice-yearly regimen, without specifying the partner drug (ViiV press release, 25 Feb 2026). The pairing of the two agents as a single regimen is reported by TAG (Pipeline Report 2026). In phase I studies in adults without HIV, a single injection of VH-184 (formulation B) maintained flat plasma concentrations through month 7, and single IM or SC injections of VH-499 (100 to 1,200 mg) maintained stable concentrations supporting dosing intervals of up to six months. VH-184 retains activity against HIV with second-generation INSTI resistance substitutions in vitro, and VH-499 binds the CPSF6/nucleoporin pocket of the capsid with picomolar potency. No clinical trial co-administering the two agents had been registered a

Approval status

Investigational. Not approved in any jurisdiction. The combination has not yet entered clinical testing as a regimen; each component is in clinical development (VH-184: oral phase IIb INNOVATE, injectable phase I; VH-499: oral phase IIa CINNAMON completed, injectable phase I, phase IIb CINERGY with cabotegravir not yet recruiting) (last updated 30 September 2026)

Regulatory authorities

Not applicable (no regulatory submission).

Safety

Component data only. VH-184 LA (phase I, 39 participants, formulations A and B, SC or IM): injection site reactions mostly grade 1 (erythema, pain, nodules), fewer grade 2, two grade 3 ISRs; safety profile described as similar to marketed INSTIs. VH-499 LA (phase I, 48 participants at 100/200/400 mg IM or SC): AEs mostly grade 1 to 2, injection site pain in 27/36 (75%) VH-499 recipients, ISRs more frequent after SC (83 to 100%) than IM (33 to 83%), median ISR duration 1 to 3 days, no serious AEs, no withdrawals for safety.

Efficacy

No efficacy data for the combination. Component proof of concept: oral VH-184 monotherapy (phase IIa, ART-naive adults, 10/50/300 mg) produced dose-dependent viral load declines, maximum -2.69 log10 copies/mL at 300 mg; oral VH-499 monotherapy (phase IIa CINNAMON) showed potent antiviral activity over 10 days.

Evidence Summary

Not provided

Delivery device(s)

Not provided


Scale-up and manufacturing prospects

Scale-up prospects

Not publicly available.

Tentative equipment list for manufacturing

Not publicly available.

Manufacturing

Not publicly available.

Specific analytical instrument required for characterization of formulation

Not publicly available.


Clinical trials

218804

Identifier

NCT06310551

Link

https://clinicaltrials.gov/study/NCT06310551

Phase

Phase I

Status

Recruiting

Sponsor

ViiV Healthcare

More details

The purpose of this study is to identify 1 or more doses of parenterally administered VH4524184 that are safe, well tolerated and yield a PK drug exposure profile necessary to deliver a long-acting antiretroviral therapy for the treatment of HIV-1 infection.

Purpose

First Time in Human Study of Long Acting VH4524184 Formulations

Interventions

Intervention 1

Oral VH4524184

Intervention 2

VH4524184 Formulation A SC

Intervention 3

Placebo Formulation A SC

Intervention 4

rHuPH20

Intervention 5

VH4524184 Formulation B SC

Countries

United States of America

Sites / Institutions

Not provided

Trials dates

Anticipated Start Date
Not provided

Actual Start Date
2024-03-21

Anticipated Date of Last Follow-up
2026-06-29

Estimated Primary Completion Date
2028-01-21

Estimated Completion Date
2028-01-21

Actual Primary Completion Date
Not provided

Actual Completion Date
Not provided

Studied populations

Age Cohort

Genders

Accepts pregnant individuals
No

Accepts lactating individuals
No

Accepts healthy individuals
Yes

Comments about the studied populations

Inclusion Criteria: Age 1. Participant must be 18 to 55 years of age inclusive, at the time of signing the informed consent. Type of Participant and Characteristics 2. Participants who are overtly healthy as determined by medical evaluation including medical history, physical examination, laboratory tests, and cardiac monitoring. 3. Participants who are negative for SARS-CoV-2, performed on admission/readmission to the Phase 1 unit, using an approved molecular test (PCR). 4. Participants who are able to understand and comply with protocol requirements and timetables, instructions, and protocol-stated restrictions. Weight 5. Body weight ≥50.0 kg (110 lbs) for men and ≥45.0 kg (99 lbs) for women and body mass index within the range 18.5 to 32.0 kg/m2 (inclusive). Sex and Contra

Health status

Negative to : HIV, HCV, HBV, COVID 19
Considered at low risk of : HIV

Study type

Interventional (clinical trial)

Enrollment

372

Allocation

Randomized

Intervention model

Parallel Assignment

Intervention model description

Not provided

Masking

Double-blind masking

Masking description

Double (Participant, Investigator)

Frequency of administration

Other/Variable/Unknown : "unknown "

Studied LA-formulation(s)

Injectable
Tablet

Studied route(s) of administration

Oral
Subcutaneous
Intra-articular

Use case

Treatment

Key resources

Not provided

218547

Identifier

NCT06724640

Link

https://clinicaltrials.gov/study/NCT06724640

Phase

Phase I

Status

Recruiting

Sponsor

ViiV Healthcare

More details

The purpose of this study is to investigate safety and tolerability following single ascending subcutaneous (SC) and intramuscular (IM) doses of VH4011499 in participants without HIV. The study will also describe the pharmacokinetics following single ascending SC and IM doses of VH4011499 in participants without HIV.

Purpose

A Study to Assess the Safety, Tolerability, and Pharmacokinetics of VH4011499 Compared to Placebo in Adults Without HIV

Interventions

Intervention 1

Drug: VH4011499 Injection (subcutaneous or intramuscular)

Intervention 2

Drug: Placebo for VH4011499 Injection

Countries

United States of America

Sites / Institutions

Not provided

Trials dates

Anticipated Start Date
Not provided

Actual Start Date
2024-12-16

Anticipated Date of Last Follow-up
2025-05-12

Estimated Primary Completion Date
2028-08-16

Estimated Completion Date
2028-08-16

Actual Primary Completion Date
Not provided

Actual Completion Date
Not provided

Studied populations

Age Cohort

Genders

Accepts pregnant individuals
Unspecified

Accepts lactating individuals
Unspecified

Accepts healthy individuals
Yes

Comments about the studied populations

Inclusion Criteria: * Participant must be 18 to 55 years of age inclusive, at the time of signing the informed consent. * Participants who are overtly healthy. * Male or female of non-childbearing potential. * Capable of giving signed informed consent. Exclusion Criteria: * History or presence of cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrine, hematological, neurological or psychiatric disorders capable of significantly altering the absorption, metabolism, or elimination of drugs; constituting a risk when taking the study intervention or interfering with the interpretation of data. * Abnormal blood pressure. * Lymphoma, leukemia, or any malignancy within the past 5 years except for basal cell or squamous epithelial carcinomas of the skin that have been resected

Health status

Negative to : HCV, HBV, HIV
Considered at low risk of : HIV

Study type

Interventional (clinical trial)

Enrollment

168

Allocation

Randomized

Intervention model

Sequential assignment

Intervention model description

Not provided

Masking

Double-blind masking

Masking description

Double (Participant, Investigator)

Frequency of administration

Once

Studied LA-formulation(s)

Injectable

Studied route(s) of administration

Subcutaneous
Intramuscular

Use case

Treatment

Key resources

Not provided

218306

Identifier

NCT06012136

Link

https://clinicaltrials.gov/study/NCT06012136

Phase

Phase I

Status

Active, not recruiting

Sponsor

ViiV Healthcare

More details

The primary purpose of the study is to investigate safety and tolerability following single ascending subcutaneous (SC) and intramuscular (IM) doses of capsid inhibitors in healthy participants. The study will also describe the pharmacokinetics following single ascending SC and IM doses of capsid inhibitors in healthy participants.

Purpose

A Study to Evaluate the Safety, Tolerability, and Pharmacokinetics of a Single Suspension Injection of Investigational Capsid Inhibitors Compared to Placebo in Healthy Adults

Interventions

Intervention 1

Drug: VH4004280

Intervention 2

Drug: VH4011499 administered either SC, SC+ rHuPH20, or IM.

Intervention 3

Drug: Placebo

Countries

United States of America

Sites / Institutions

Not provided

Trials dates

Anticipated Start Date
Not provided

Actual Start Date
2023-08-24

Anticipated Date of Last Follow-up
2025-04-17

Estimated Primary Completion Date
2026-09-02

Estimated Completion Date
2026-09-02

Actual Primary Completion Date
Not provided

Actual Completion Date
Not provided

Studied populations

Age Cohort

Genders

Accepts pregnant individuals
Unspecified

Accepts lactating individuals
Unspecified

Accepts healthy individuals
Yes

Comments about the studied populations

Inclusion Criteria: * Participants who are overtly healthy. * Participants who are negative on a single test for Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) (approved molecular polymerase chain reaction (PCR), point of care test), performed on the day of admission (Day -1). A negative result is required prior to the administration of study intervention on Day 1. * Male or female participants of non-childbearing potential. * Capable of giving signed informed consent. Exclusion Criteria: * History or presence of cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrine, hematological, neurological or psychiatric disorders capable of significantly altering the absorption, metabolism, or elimination of drugs.

Health status

Considered at low risk of : HIV
Negative to : HIV, COVID 19

Study type

Interventional (clinical trial)

Enrollment

208

Allocation

Randomized

Intervention model

Sequential assignment

Intervention model description

Not provided

Masking

Double-blind masking

Masking description

Double (Participant, Investigator)

Frequency of administration

Once

Studied LA-formulation(s)

Injectable

Studied route(s) of administration

Subcutaneous
Intramuscular

Use case

Treatment

Key resources

Type Title Content Link
Link Proof-of-Concept Trial of Oral VH4011499 (VH-499), a New HIV-1 Capsid Inhibitor https://www.natap.org/2025/CROI/croi_29.htm

Excipients

Proprietary excipients used

Not provided

Novel excipients or existing excipients at a concentration above Inactive Ingredients Database (IID) for the specified route of administration

Not provided

Residual solvents used

Not provided


Patent info

There are either no relevant patents or these were not yet submitted to LAPaL


Supporting material

Publications

The Antiretroviral Therapy Pipeline 2026. Treatment Action Group Pipeline Report, August 2026.

Jefferys R. — Treatment Action Group Pipeline Report, — 2026-08-15

Jefferys R. The Antiretroviral Therapy Pipeline 2026. Treatment Action Group Pipeline Report, August 2026.

Additional documents

No documents were uploaded

Useful links


Additional information

Not provided