Samtidig administration af krampestillende aktive substanser, kendt som enzymatiske induktorer (phenytoin, carbamazepin, phenobarbital), og amprenavir kan føre til nedsat plasmakoncentration af amprenavir.
Anticonvulsant active substances: concomitant administration of anticonvulsant active substances known as enzymatic inductors (phenytoin, phenobarbital, carbamazepine) with amprenavir may lead to a decrease in the plasma concentrations of amprenavir.