Der var ingen klinisk signifikante farmakokinetiske interaktioner, når efavirenz blev administreret sammen med azithromycin, cetirizin, lorazepam, nelfinavir, zidovudin, aluminium/ magnesiumhydroxidantacida, famotidin eller fluconazol.
Studies conducted with other medicinal products: there were no clinically significant pharmacokinetic interactions when efavirenz was administered with azithromycin, cetirizine, lorazepam, nelfinavir, zidovudine, aluminium/ magnesium hydroxide antacids, famotidine or fluconazole.