Emergency Drug Box - clonazepam online Some drugs may interact negatively with Klonopin like Pro-Banthine, Diflucan, Sporanox, Nizoral, Vfend, Elavil, Efrafon, Sinequan, Janimine, Tofranil, Pamelor, Amytal, Butisol, Mebaral, Seconal, Luminal, Solfoton, and others.