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AIDSinfo Drug Database

AIDSinfo Drug Database

Drugs by class

FDA-approved

Investigational

Doravirine  Audio icon

Other Names: DOR, MK-1439
Drug Class: Non-nucleoside Reverse Transcriptase Inhibitors
Molecular Formula: C17 H11 Cl F3 N5 O3
Registry Number: 1338225-97-0 (CAS)
Chemical Name: 3-chloro-5-[[1-[(4-methyl-5-oxo-1H-1,2,4-triazol-3-yl)methyl]-2-oxo-4-(trifluoromethyl)-3-pyridyl]oxy]benzonitrile
Company: Merck & Co., Inc.
Phase of Development: Phase III, as a single-drug tablet and as part of a fixed-dose combination (FDC) tablet containing doravirine/lamivudine/tenofovir DF
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Chemical Image:
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doravirine
doravirine
Molecular Weight: 425.7529
(Compound details obtained from ChemIDplus Advanced,1 NIAID Therapeutics Database, and ClinicalTrials.gov3,4)

What is an investigational drug?

An investigational drug is one that is under study and is not approved by the U.S. Food and Drug Administration (FDA) for sale in the United States. Medical research studies are conducted to evaluate the safety and effectiveness of an investigational drug. These research studies are also called clinical trials. Once an investigational drug has been proven safe and effective in clinical trials, FDA may approve the drug for sale in the United States.

To learn more about investigational drugs, read the AIDSinfo What is an Investigational HIV Drug? fact sheet.

What is doravirine?

Doravirine is an investigational drug that is being studied for the treatment of HIV infection. Doravirine is being studied as a single-drug tablet and also as part of a fixed-dose combination (FDC) tablet that includes doravirine plus two FDA-approved HIV medicines.3,4

Doravirine belongs to a class (group) of HIV drugs called non-nucleoside reverse transcriptase inhibitors (NNRTIs).2 NNRTIs attach to and block an HIV enzyme called reverse transcriptase. (An enzyme is a protein that starts or increases the speed of a chemical reaction.) By blocking reverse transcriptase, NNRTIs prevent HIV from multiplying and can reduce the amount of HIV in the body.

In vitro, doravirine appears to work on certain HIV strains against which other FDA-approved NNRTIs, such as rilpivirine (brand name: Edurant) and efavirenz (brand name: Sustiva), may no longer work.5 (In vitro refers to studies done in test tubes or other laboratory equipment and not on animals or humans.)

How are clinical trials of investigational drugs conducted?

Clinical trials are conducted in phases. Each phase has a different purpose and helps researchers answer different questions.6

  • Phase I trials: Researchers test an investigational drug in a small group of people (20–80) for the first time. The purpose is to evaluate its safety and identify side effects.
  • Phase II trials: The investigational drug is administered to a larger group of people (100–300) to determine its effectiveness and to further evaluate its safety.
  • Phase III trials: The investigational drug is administered to large groups of people (1,000–3,000) to confirm its effectiveness, monitor side effects, compare it with standard or equivalent treatments, and collect information that will allow the investigational drug to be used safely.6

In most cases, an investigational drug must be proven effective and must show continued safety in a Phase III clinical trial to be considered for approval by FDA for sale in the United States. Some drugs go through FDA’s accelerated approval process and are approved before a Phase III clinical trial is complete. After a drug is approved by FDA and made available to the public, researchers track its safety in Phase IV trials to seek more information about the drug’s risks, benefits, and optimal use.6

In what phase of testing is doravirine?

Doravirine is currently being studied in Phase III clinical trials as both a single-drug tablet and as part of an FDC tablet.3,4

What are some studies on doravirine?

Doravirine Single-Drug Tablet

Study Name: MK-1439-007; NCT01632345
Sponsor: Merck Sharp & Dohme Corp.
Phase: IIb
Location: Not available
Participants: Participants were HIV-infected adults who had not taken HIV medicines before entering the study (also called treatment-naive). Participants had viral load levels of at least 1,000 copies/mL and CD4 counts of at least 100 cells/mm3. (Viral load is the amount of HIV in a blood sample.)
Purpose: The purpose of this study was to (1) find a safe and effective dose of doravirine, and then (2) compare the safety and effectiveness of the chosen doravirine dose to the safety and effectiveness of the HIV medicine efavirenz (brand name: Sustiva). Safety assessments included looking at side effects affecting the central nervous system. (The central nervous system includes the brain and spinal cord).7  

Study Name: MK-1439-018; NCT02275780
Sponsor: Merck Sharp & Dohme Corp.
Phase: III
Location: Not available
Participants: Participants are HIV-infected, treatment-naive adults.
Purpose: The purpose of this study is to compare the safety and effectiveness of doravirine to the safety and effectiveness of darunavir (brand name: Prezista) plus ritonavir (brand name: Norvir).

* This study is currently ongoing, and results are not yet available.8

FDC Tablet MK-1439A
The FDC tablet MK-1439A includes doravirine and the FDA-approved HIV medicines lamivudine and tenofovir disoproxil fumarate.

Study Names: MK-1439A-021; NCT02403674
Sponsor: Merck Sharp & Dohme Corp.
Phase: III
Location: Not available
Participants: Participants are HIV-infected, treatment-naive adults. Participants have viral load levels of at least 1,000 copies/mL within 45 days of the treatment part of the study.
Study Purpose: The purpose of this study is to evaluate the safety and effectiveness of MK-1439A and to compare MK-1439A to Atripla. (Atripla is an FDA-approved FDC tablet that includes the HIV medicines efavirenz, emtricitabine, and tenofovir disoproxil fumarate.)
* This study is currently ongoing.4

MK-1439A will also be evaluated in three additional studies. A Phase IIa study (NCT02629822) will look at MK-1439A in treatment-naive adults who are infected with certain HIV strains that do not respond well to other NNRTIs. The other two studies, a Phase IIb study (NCT02652260) and a Phase III study (NCT02397096), involve participants whose HIV is suppressed with antiretroviral therapy (ART). (ART is the recommended treatment for HIV infection and involves using a combination of different HIV medicines to prevent HIV from multiplying.)8-10

For more details on the studies listed above, see the Health Professional version.

What side effects might doravirine cause?

In the Phase IIb study (NCT01632345) discussed under the previous question, the most common central nervous system side effects that occurred through the first 24 weeks of treatment were dizziness, insomnia, abnormal dreams, and nightmares. Among the most common central nervous system side effects, insomnia was the only side effect that occurred in more doravirine-treated participants than efavirenz-treated participants.7,11,12

An analysis at 48 weeks showed that the most common drug-related side effects that occurred in more than 5% of participants taking either 100 mg of doravirine or 600 mg of efavirenz were diarrhea, nausea, dizziness, headache, abnormal dreams, insomnia, nightmares, and sleep disorder. All of the above side effects, except nausea and insomnia, occurred in a greater number of participants in the efavirenz group than in the doravirine group. Three participants taking doravirine and six participants taking efavirenz stopped treatment because of a side effect.13,14

Because doravirine is still being studied, information on possible side effects of the drug is not complete. As testing of doravirine continues, additional information on possible side effects will be gathered.

Where can I get more information about clinical trials studying doravirine?

More information about doravirine-related research studies is available from the AIDSinfo database of ClinicalTrials.gov study summaries. Click on the title of any trial in the list to see the ClinicalTrials.gov trial summary and more information about the study.

I am interested in participating in a clinical trial of doravirine. How can I find more information about participating in a clinical trial?

Participating in a clinical trial can provide benefits. For example, a volunteer participant can benefit from new research treatments before they are widely available. Participants also receive regular and careful medical attention from a research team that includes doctors and other health professionals. However, clinical trials may also involve risks of varying degrees, such as unpleasant, serious, or even life-threatening side effects from the treatment being studied.4

Your health care provider can help you decide whether participating in a clinical trial is right for you. For more information, visit NIH Clinical Research Trials and You.

References

  1. United States National Library of Medicine. ChemIDplus Advanced. Available at: http://chem.sis.nlm.nih.gov/chemidplus/rn/1338225-97-0. Last accessed on August 12, 2016.
  2. National Institute of Allergy and Infectious Diseases (NIAID). NIAID ChemDB, HIV Drugs in Development. NIAID ChemDB, HIV Drugs in Development. Available at: http://chemdb.niaid.nih.gov/DrugDevelopmentHIV.aspx. Last accessed on August 12, 2016.
  3. Merck Sharp & Dohme Corp. A Phase 3 Multicenter, Double-Blind, Randomized, Active Comparator-Controlled Clinical Trial to Evaluate the Safety and Efficacy of Doravirine (MK-1439) 100 mg Once Daily Versus Darunavir 800 mg Once Daily Plus Ritonavir 100 mg Once Daily, Each in Combination With TRUVADA™ or EPZICOM™/KIVEXA™, in Treatment-Naïve HIV-1 Infected Subjects. In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered on October 23, 2014. NLM Identifier: NCT02275780. Available at: https://www.clinicaltrials.gov/ct2/show/NCT02275780. Last accessed on August 12, 2016.
  4. Merck Sharp & Dohme Corp. A Phase III Multicenter, Double-Blind, Randomized, Active Comparator-Controlled Clinical Trial to Evaluate the Safety and Efficacy of MK-1439A Once-Daily Versus ATRIPLA™ Once-Daily in Treatment-Naïve HIV-1 Infected Subjects. In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered on March 26, 2015. NLM Identifier: NCT02403674. Available at: https://www.clinicaltrials.gov/ct2/show/NCT02403674. Last accessed on August 12, 2016.
  5. Feng M, Wang D, Grobler JA, Hazuda DJ, Miller MD, Lai MT. In Vitro Resistance Selection with Doravirine (MK-1439), a Novel Nonnucleoside Reverse Transcriptase Inhibitor with Distinct Mutation Development Pathways. Antimicrob Agents Chemother. 2015 Jan;59(1):590-8. Available at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4291404/. Last accessed on August 12, 2016.
  6. National Institutes of Health (NIH). NIH Clinical Research Trials and You. Available at: http://www.nih.gov/health-information/nih-clinical-research-trials-you. Last accessed on August 12, 2016.
  7. Merck Sharp & Dohme Corp. Multicenter, Double-Blind, Randomized, 2-Part, Dose Ranging Study to Compare the Safety, and Antiretroviral Activity of MK-1439 Plus TRUVADA Versus Efavirenz Plus TRUVADA in Antiretroviral Treatment-Naive, HIV-1 Infected Patients. In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered on June 28, 2012. NLM Identifier: NCT01632345. Available at: https://www.clinicaltrials.gov/ct2/show/NCT01632345. Last accessed on August 12, 2016.
  8. Merck Sharp & Dohme Corp. A Phase IIa Multicenter, Open-Label Clinical Trial to Evaluate the Safety and Efficacy of MK-1439A in Treatment-Naïve HIV-1 Infected Subjects With Selected Non-Nucleoside Reverse Transcriptase Inhibitor (NNRTI) Transmitted Resistance Mutations. In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered on December 10, 2015. NLM Identifier: NCT02629822. Available at: https://clinicaltrials.gov/ct2/show/NCT02629822. Last accessed on August 12, 2016.
  9. Merck Sharp & Dohme Corp. Phase IIb, Double-Blinded, Multicenter, Randomized Study to Assess the Effect on Central Nervous System (CNS) Toxicity of Switching From ATRIPLA™ (Efavirenz, Tenofovir, Emtricitabine) to MK-1439A (Doravirine, Tenofovir, Lamivudine) in Virologically-Suppressed Subjects. In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered on January 8, 2016. NLM Identifier: NCT02652260. Available at: https://clinicaltrials.gov/ct2/show/NCT02652260. Last accessed on August 12, 2016.
  10. Merck Sharp & Dohme Corp. A Phase III Multicenter, Open-Label, Randomized Study to Evaluate a Switch to MK-1439A in HIV-1-Infected Subjects Virologically Suppressed on a Regimen of a Ritonavir-boosted Protease Inhibitor and Two Nucleoside Reverse Transcriptase Inhibitors (NRTIs). In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered on March 18, 2015. NLM Identifier: NCT02397096. Available at: https://www.clinicaltrials.gov/ct2/show/NCT02397096. Last accessed on August 12, 2016.
  11. Gatell JM, Raffi F, Plettenberg A, et al. Efficacy and Safety of Doravirine 100mg QD vs Efavirenz 600mg QD with TDF/FTC in ART-Naive HIV-Infected Patients: Week 24 Results. 8th International AIDS Society Conference on HIV Pathogenesis, Treatment & Prevention; July 19-22, 2015; Vancouver, Canada. Levin: Conference Reports for National AIDS Treatment Advocacy Project (NATAP); 2015. Available at: http://www.natap.org/2015/IAS/IAS_22.htm. Last accessed on August 12, 2016.
  12. Gatell J, Raffi F, Plettenber A, et al. Efficacy and safety of doravirine 100mg QD vs efavirenz 600mg QD with TDF/FTC in ART-naive HIV-infected patients: week 24 results. Abstract presented at: 8th International AIDS Society Conference on HIV Pathogenesis, Treatment & Prevention; July 19-22, 2015; Vancouver, Canada. Abstract TUAB0104. Available at: http://www.ias2015.org/WebContent/File/IAS_2015__MED2.pdf. Last accessed on August 12, 2016.
  13. Gatell JM, Raffi F, Plettenberg A, et al. Doravirine 100 mg QD vs Efavirenz +TDF/FTC in ART-Naive HIV+ Patients: Week 48 Results. Poster presented at: 23rd Conference on Retroviruses and Opportunistic Infections (CROI); February 22-25, 2016; Boston, MA. Poster 470. Available at: http://www.croiconference.org/sites/default/files/posters-2016/470.pdf. Last accessed on August 12, 2016.
  14. Gatell JM, Raffi F, Plettenberg A, et al. Doravirine 100mg QD vs Efavirenz +TDF/FTC in ART-Naive HIV+ Patients: Week 48 Results. Abstract presented at: 23rd Conference on Retroviruses and Opportunistic Infections (CROI); February 22-25, 2016; Boston, MA. Abstract 470. Available at: http://www.croiconference.org/sessions/doravirine-100mg-qd-vs-efavirenz-tdfftc-art-naive-hiv-patients-week-48-results. Last accessed on August 12, 2016.


Last Reviewed: August 14, 2016

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