No Interaction Expected
Emtricitabine/Tenofovir-DF (FTC/TDF, PrEP)
Quality of Evidence:
Coadministration has not been studied but based on metabolism and clearance a clinically significant interaction is unlikely. Cefotaxime is partially metabolized by non-specific esterases. Most of a dose of cefotaxime is excreted in the urine - about 60% as unchanged drug and a further 24% as desacetyl-cefotaxime, an active metabolite. In vitro studies indicate that OAT3 participates in the renal elimination of cefotaxime whereas emtricitabine and tenofovir are eliminated by other renal transporters.
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