“Clinical trials indicate …’s wort Hypericum perforatum ), via cytochrome P450 (CYP) and/or P-glycoprotein … plasma concentrations (and/or increases the clearance) of alprazolam , amitriptyline, atorvastatin, chlorzoxazone, ciclosporin, debrisoquine, digoxin, erythromycin, fexofenadine, gliclazide, imatinib, indinavir, irinotecan, ivabradine, …, nifedipine, omeprazole, oral contraceptives, quazepam, simvastatin, tacrolimus, talinolol, verapamil, voriconazole and warfarin.”