Drug class	Common examples
Anti-infective	Ketoconazole
Anti-inflammatory	Cyclooxygenase-2 inhibitors, nonsteroidal anti-inflammatory drugs
Chemotherapeutic	Vascular endothelial growth factor inhibitors
Herbal	Ephedra, ginseng, ma huang
Illicit	Amphetamines, cocaine
Immunosuppressive agents	Cyclosporine (Sandimmune), sirolimus (Rapamune), tacrolimus (Prograf)
Psychiatric	Buspirone (Buspar), carbamazepine (Tegretol), clozapine (Clozaril), lithium, monoamine oxidase inhibitors, selective serotonin reuptake inhibitors, serotonin-norepinephrine reuptake inhibitors, tricyclic antidepressants
Sex hormones	Estrogen and progesterone in oral contraceptives; androgens
Steroid	Methylprednisolone, prednisone
Sympathomimetic	Decongestants, diet pills