INH, rifampin, erythromycin, ketoconazole, itraconazole, oral anticoagulants, anticonvulsants, anticholinergics, anticholinesterases, antidiabetic drugs, antiemetic, antivirals, aromatase inhibitors, diuretics, live vaccines, Ca channel blocker; cyclosporin, pancuronium, CNS active drugs & salicylates.