Enhanced: aspirin, amiodarone, propafenone, morethizine, omeprazole, cimetidine, erythromycin, ofloxacin, ciprofloxacin, ketoconazole, cephalosporin, metronidazole, paracetamol, metformin, gemfibrozil, salvia, ginkgo biloba, angelica, ginger, garlic, wolfberry Diminished: barbiturates, rifampicin, ciclosporin A, carbamazepine, vitamin C, sansum No effect: famotidine, atorvastatin, fluvastatin