Bictegravir, emtricitabine, and tenofovir alafenamide and Rifampin interaction
Bictegravir, emtricitabine, and tenofovir alafenamide and Rifampin: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Bictegravir, emtricitabine, and tenofovir alafenamide (BIXLENVO) label · effective 2026-08-27
Antimycobacterials: rifabutin Drug-drug interaction study was conducted for components of BIXLENVO dosed as individual agents (BIC or LEN). rifampin rifapentine ↓ lenacapavir ↓ bictegravir Concomitant administration with rifampin is contraindicated [see Contraindications (4) ] .
Concomitant administration of BIXLENVO is contraindicated with: dofetilide due to the potential for increased dofetilide plasma concentrations and associated serious and/or life-threatening events. strong CYP3A inducers due to decreased plasma concentrations of BIC and LEN, which may result in the loss of therapeutic effect and development of resistance to BIXLENVO.
Concomitant administration of BIXLENVO is contraindicated with: Dofetilide Strong CYP3A inducers.
Concomitant administration of BIXLENVO with strong CYP3A inducers is contraindicated [see Contraindications (4) ] .
Concomitant administration of BIXLENVO with moderate CYP3A inducers is not recommended.
From the Rifampin (Rifadin IV) label · effective 2026-05-27
…Concentrations Administered with rifampin 600 mg daily, unless otherwise specified Drug or Drug Class and Prevention or Management Clinical Effect AUC = area under the time-concentration curve Antiretrovirals Prevention or Management: Concomitant use is contraindicated (see CONTRAINDICATIONS ) Atazanavir Decrease AUC by 72% Darunavir Rifampin dosage used concomitantly with…
Cabotegravir Decrease AUC by 59% Fostemsavir Decrease AUC by 82% Lenacapavir (SUNLENCA ® ) Indicated for the treatment of human immunodeficiency virus-1 (HIV-1) infection Decrease AUC by 84% Antiretrovirals Prevention or Management: Avoid concomitant use Zidovudine Decrease AUC by 47% Indinavir Decrease AUC by 92% Efavirenz Decrease AUC by 26% Antiretrovirals Prevention…
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Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.