In a drug interaction study, carbamazepine plasma concentrations were decreased when carbamazepine was co-administered with efavirenz (see section 4.5).
Ravimi koostoimete uuringus, kui karbamasepiini manustati koos efavirensiga, vähenesid karbamasepiini plasma kontsentratsioonid (vt lõik 4. 5).