Biotech Stock Intel
Catalyst CalendarPDUFA CalendarMover SignalsCompany Screener
Disclaimer: Biotech Stock Intel is an independent research platform. Information is provided for informational purposes only and is not investment or medical advice. Always verify catalyst dates against primary sources and conduct your own research.
Biotech Stock Intel© 2026 Biotech Stock Intel
AboutMethodologyTermsPrivacy
Biotech Stock Intel
Catalyst CalendarPDUFA CalendarMover SignalsCompany Screener
Home/Stocks/MRK/Catalyst
ApprovedUpdate

Doravirine / Islatravir (DOR/ISL)

Virologically Suppressed HIV-1 Infection

MRKMerck & Co
Expected catalystTBA

Catalyst overview

Event details

Drug or asset
Doravirine / Islatravir (DOR/ISL)
Development stage
Approved
Event type
Update
Indication
Virologically Suppressed HIV-1 Infection

Research summary

What is being tracked?

This catalyst tracks a Approved update for Doravirine / Islatravir (DOR/ISL) in Virologically Suppressed HIV-1 Infection. The expected timing is based on the latest available company guidance and may change.

Development notes

12/19/24- Reported topline results. 3/12/25- Data reported. Submit MA to regulatory agencies by mid-2025. 7/10/25- NDA accepted with PDUFA date April 28, 2026. 11/19/25– Topline data reported. 02/26/26:- Ph3 MK-8591A-051/052/053 showed non-inferior efficacy, durable 96-week suppression, and similar safety; PDUFA unchanged. 04/21/26:- Trials 051/052 Week 48 noninferior; FDA approved IDVYNSO; available after May 11. 07/15/26:- Week 96 DOR/ISL maintained suppression; data presented at AIDS 2026 July 28, 2026.

Verification

Primary source

Confirm timing and program details against the company announcement or filing.

Open source

More from MRK

Related pipeline programs

Approved

Welireg/Belzutifan (MK-6482) + Keytruda/Pembrolizumab (MK-3475) (HIF-2α/PD-1 Blockade)

Adjuvant Clear Cell Renal Cell Carcinoma After Nephrectomy

View company pipeline
Approved

KEYTRUDA® plus chemotherapy +/- bevacizumab

Platinum-Resistant Recurrent Ovarian Cancer

View company pipeline
PDUFA

Ifinatamab Deruxtecan (I-DXd)

Small cell lung cancer, Cancer

View company pipeline
PDUFA

WELIREG/Belzutifan (MK-6482) + LENVIMA/Lenvatinib (E7080) (HIF-2α Combo)

Advanced Clear Cell Renal Cell Carcinoma After PD-1/PD-L1 Therapy

View company pipeline

Company

Merck & Co

MRK · NYSE
Industry
Biotechnology
Pipeline assets
96
View MRK research

BioPharma Pro

Track every date change

Watchlists, source history and catalyst alerts will be available with Pro.

Start free

Updated Aug 23, 2026. Dates can change; this is not investment advice.

Disclaimer: Biotech Stock Intel is an independent research platform. Information is provided for informational purposes only and is not investment or medical advice. Always verify catalyst dates against primary sources and conduct your own research.
Biotech Stock Intel© 2026 Biotech Stock Intel
AboutMethodologyTermsPrivacy