Tab: Concomitant use w/ cardiac glycosides, diuretics, glucocorticoid, cyclosporine, ketoconazole, troleandomycin, rifampicin, rifabutin, carbamazepine, phenobarb, phenytoin, primidone, aminoglutethimide, NSAIDs, salicylate. Inj: Concomitant use w/ INH, rifampicin, oral anticoagulants, carbamazepine, phenobarb, phenytoin, neuromuscular blockers, anticholinesterase, antidiabetic agents, aprepitant, fosaprepitant, itraconazole, ketoconazole, HIV PIs (eg, indinavir, ritonavir), aminoglutethimide, diltiazem, ethinylestradiol/norethinderone, grapefruit juice, cyclophosphamide, tacrolimus, clarithromycin, erythromycin, troleandomycin, NSAIDs, high dose aspirin (ASA), K depleting agents (amphotericin B, xanthenes, β
2 agonists.