When efavirenz is co- administered with an anticonvulsant that is a substrate of CYP450 isoenzymes, periodic monitoring of anticonvulsant levels should be conducted.
Kui efavirensi manustatakse koos antikonvulsandiga, mis on CYP450 isoensüümide substraat, tuleb perioodiliselt määrata antikonvulsandi sisaldust.