Emtricitabine and tenofovir and Rifapentine interaction
Emtricitabine and tenofovir and Rifapentine: 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 Emtricitabine and tenofovir (DESCOVY) label · effective 2026-07-07
Antimycobacterials: rifabutin rifampin rifapentine ↓ TAF Coadministration of DESCOVY with rifabutin, rifampin, or rifapentine is not recommended.
TAF is not an inhibitor or inducer of CYP3A in vivo .
From the Rifapentine (Priftin) label · effective 2026-02-06
Fixed-Dose Combination of Efavirenz, Emtricitabine, and Tenofovir Once-weekly coadministration of 900 mg PRIFTIN with the antiretroviral fixed-dose combination of efavirenz 600 mg, emtricitabine 200 mg and tenofovir disoproxil fumarate 300 mg in HIV-infected patients did not result in any substantial change in steady state exposures of efavirenz, emtricitabine,…
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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.