Increased levels/effects with enzyme inhibitors (e.g. fluconazole). Increased hypoglycaemic effects with salicylates, MAOIs, nonselective beta-blockers, alcohol, NSAIDs. Decreased levels/effects with enzyme inducers (e.g. rifampicin). Decreased hypoglycaemic effects with thiazide diuretics, corticosteroids, thyroid products and sympathomimetic agents.