Darunavir and cobicistat and Emtricitabine, rilpivirine, and tenofovir interaction
Darunavir and cobicistat and Emtricitabine, rilpivirine, and tenofovir: 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, rilpivirine, and tenofovir (COMPLERA) label · effective 2025-07-16
COMPLERA is a complete regimen for the treatment of HIV-1 infection; therefore, coadministration with other antiretroviral medications for treatment of HIV-1 infection is not recommended.
Not Recommended with Other Antiretroviral Medications Because COMPLERA is a complete regimen, coadministration with other antiretroviral medications for the treatment of HIV-1 infection is not recommended.
Drugs Inducing or Inhibiting CYP3A Enzymes Rilpivirine is primarily metabolized by cytochrome P450 (CYP) 3A, and drugs that induce or inhibit CYP3A may thus affect the clearance of RPV [see Contraindications (4) , Warnings and Precautions (5.7) , and Clinical Pharmacology (12.3) ] .
Coadministration of RPV and drugs that inhibit CYP3A may result in increased plasma concentrations of RPV.
Lactic Acidosis/Severe Hepatomegaly with Steatosis Lactic acidosis and severe hepatomegaly with steatosis, including fatal cases, have been reported with the use of nucleoside analogs, including TDF and FTC, components of COMPLERA, alone or in combination with other antiretrovirals.
From the Darunavir and cobicistat (PREZCOBIX) label · effective 2026-02-01
Co-administration of PREZCOBIX or PREZCOBIX PED and tenofovir DF is not recommended in patients who have an estimated creatinine clearance below 70 mL/min [see Dosage and Administration (2.4) ] .
Co-administration of PREZCOBIX or PREZCOBIX PED and tenofovir DF in combination with concomitant or recent use of a nephrotoxic agent is not recommended.
PREZCOBIX or PREZCOBIX PED is not recommended in combination with other antiretroviral drugs that require pharmacokinetic boosting.
Document urine glucose and urine protein at baseline [see Dosage and Administration (2.4) ] and perform routine monitoring of estimated creatinine clearance, urine glucose, and urine protein during treatment when PREZCOBIX or PREZCOBIX PED is used with tenofovir DF.
Measure serum phosphorus in patients with or at risk for renal impairment when used with tenofovir DF.
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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.