TheraRadar
Data updated: May 26, 2026

PIFELTRO (doravirine)

Non-Nucleoside Reverse Transcriptase Inhibitors
Infectious Disease Approved 2018-08-30

Pifeltro treats HIV-1 infection in adults and pediatric patients weighing at least 35 kg. It is used for individuals who have not previously taken antiretroviral therapy or as a replacement for those currently on a stable, successful regimen with low viral levels. This medication helps patients maintain viral suppression when used in combination with other antiretroviral agents, provided there is no history of treatment failure or resistance to the drug.

Source: FDA Label • Merck • Human Immunodeficiency Virus 1 Non-Nucleoside Analog Reverse Transcriptase Inhibitor

How PIFELTRO Works

Pifeltro works by acting as a non-nucleoside analog reverse transcriptase inhibitor against the HIV-1 virus. As an antiretroviral agent, it targets the viral replication process to help control the infection.

4
Indications
--
Phase 3 Trials
1
Priority Reviews
7
Years on Market

Details

Status
Prescription
First Approved
2018-08-30
Patent Cliff
2032

Pro Metrics

Patent cliff and revenue data

Unlock with Pro
Routes
ORAL
Dosage Forms
TABLET

Companies

Active Ingredient: DORAVIRINE

PIFELTRO Approval History

2019
2020
2021
2022
2023
2024
2025
2026
Original
New Indication
New Form
Label Update
6 FDA actions from 2018 to 2025 · 3 indication expansions
Oct 2025 SUPPL
Label · Labeling
Nov 2024 SUPPL
Label · Labeling
Jan 2022 SUPPL Priority
Efficacy

What PIFELTRO Treats

1 indications

PIFELTRO is approved for 1 conditions since its original approval in 2018. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • HIV-1 Infection
Source: FDA Label

PIFELTRO Competitive Set

Pro

Three rings of competition based on shared molecular targets and treated indications.

Unlock 8 more competitors across all three rings.
Upgrade to Pro

Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.

Drugs Similar to PIFELTRO

3 of 20

FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.

ABACAVIR SULFATE
ABACAVIR SULFATE
1 shared
Aurobindo Pharma
Shared indications:
APRETUDE
CABOTEGRAVIR
1 shared
VIIV HLTHCARE
Shared indications:
APTIVUS
TIPRANAVIR
1 shared
Boehringer Ingelheim
Shared indications:
📋

Clinical Trial Registry

16 trials
Trial Sponsor ID Phase Status Title
NCT04375800 1439-066 MK-1439-066, 2019-003955-13 Ph 2 recruiting Doravirine (DOR) in Human Immunodeficiency Virus (HIV)-Infected Children Aged 4 Weeks to <12 Years and <45 kg (MK-1439-066)
NCT04900974 results posted 20-0052 Ph 1 completed Single Dose Pharmacokinetics of Doravirine in HIV-infected Pregnant Women
NCT05630638 DoraDO UoL001707 Ph 4 recruiting Doravirine Dose Optimisation in Pregnancy
NCT06719570 8591A-055 MK-8591A-055, CA42943 Ph 1 completed A Study of Doravirine and Islatravir as a Single Entity or Combination Therapy and the Effect of Food in Healthy Adult Participants (MK-8591A-055)
NCT02275780 DRIVE-FORWARD results posted 1439-018 MK-1439-018, 2014-001127-69 Ph 3 completed Safety and Efficacy of Doravirine (MK-1439) in Participants With Human Immunodeficiency Virus 1 (HIV-1) (MK-1439-018)
NCT03894124 results posted CRF001 2019-000978-33 Ph 1 completed Pharmacokinetics of Plasma Doravirine Once Daily Over 72 Hours Following Drug Intake Cessation in Healthy Volunteers
NCT04689737 results posted Dora-HD Ph 4 completed Removal of Doravirine by Hemodialysis in HIV-Infected Patients With End-stage Renal Disease (ESRD)
NCT04892654 DORDOL CW004 2020-003928-17 Ph 3 recruiting Efficacy of Doravirine + Dolutegravir Dual Therapy in the Context of Antiretroviral Therapy Switch
NCT03272347 results posted 8591-011 2017-000437-32 Ph 2 completed Islatravir (MK-8591) With Doravirine and Lamivudine in Participants Infected With Human Immunodeficiency Virus Type 1 (MK-8591-011)
NCT04097925 results posted DORAGEN 2018-003921-27 Ph 2 completed Doravirine Concentrations and Antiviral Activity in Genital Fluids in HIV-1 Infected Individuals
NCT04079452 results posted DORACeNeS 2018-003915-24 Ph 3 completed Doravirine Concentrations and Antiviral Activity in Cerebrospinal Fluid in HIV-1 Infected Individuals
NCT01632345 results posted 1439-007 MK-1439-007, 2012-001573-93 Ph 2 completed A Dose-Ranging Study to Compare Doravirine (MK-1439) Plus TRUVADA® Versus Efavirenz Plus TRUVADA® in Human Immunodeficiency Virus (HIV)-1 Infected Participants (MK-1439-007)
NCT02715700 results posted 1439-045 MK-1439-045 Ph 1 completed Effects of Doravirine (MK-1439) on Methadone Pharmacokinetics in Methadone-Maintained Participants (MK-1439-045)
NCT01466985 results posted 1439-005 2011-003508-19, MK-1439-005 Ph 1 completed A Study of Doravirine (MK-1439) in Human Immunodeficiency Virus Type 1 (HIV-1)-Infected Participants (MK-1439-005)
NCT02641067 results posted 1439-051 MK-1439-051 Ph 1 completed A Study Evaluating the Pharmacokinetics of Doravirine (MK-1439) in Participants With Severe Renal Impairment (MK-1439-051)
NCT02089659 results posted 1439-019 MK-1439-019 Ph 1 completed A Study to Investigate the Influence of Hepatic Insufficiency on the Pharmacokinetics of Doravirine (MK-1439) (MK-1439-019)
🔬

Active Pipeline

Pro

Ongoing clinical trials by development phase

Loading...

Key Completed Trials

Pro

Completed studies with published results, ranked by significance

Loading...
📊

Trial Timeline

Full development history with FDA approval milestones

|
Loading...
Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

PIFELTRO FDA Label Details

Indications & Usage

FDA Label (PDF)

PIFELTRO is indicated for the treatment of HIV-1 Infection.

View full patent landscape →
1 OB patents · 1 families · 88 international docs across 45 countries

PIFELTRO Patents & Exclusivity

Latest Patent: Aug 2032

Patents (1 active)

US8486975 Expires Aug 30, 2032
Source: FDA Orange Book

Pro Intelligence Preview

Deep insights for PIFELTRO

Revenue Insights

  • Quarterly revenue tracking
  • Historical trend analysis

Patent Timeline

  • Cliff: 2032
  • 3 active patents

Trial Analysis

  • Clinical trial tracking
  • Development stage analysis

Competitive Landscape

  • 20 similar drugs
  • Same target/indication analysis
Unlock Full Intelligence

Full approval history • All patents • Revenue trends • Competitor analysis

Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.