β-blockers, ACE inhibitors eg, captopril, AIIA eg, losartan, azapropazone & other NSAIDs, sulfinpyrazone, aminoglutethimide, testosterone, co-trimoxazole, fluconazole, nifedipine, loop diuretics, octreotide, rifamycins, lithium, chloramphenicol, cimetidine, clofibrate, corticosteroids, coumarin derivatives, disopyramide, laxatives, MAOIs, oral miconazole, OC, phenothiazine derivatives, phenylbutazone, salicylates, sulfonamides, tetracyclines, diazoxide, thiazide diuretics, thyroid hormones.