Increased plasma conc of ethinylestradiol, cardiac glycosides. Reduced plasma conc by rifampicin. Increased risk of renal impairment & antagonized hypotensive effect w/ ACE inhibitors, angiotensin II receptor antagonists. Antagonized hypotensive effect of adrenergic neurone blockers, aliskiren, α- & β-blockers, Ca-channel blockers, clonidine, diazoxide, hydralazine, methyldopa, minoxidil, moxonidine, nitrates, Na nitroprusside. Increased risk of hyperkalemia w/ aldosterone antagonists, K-sparing diuretics. Increased risk of bleeding w/ SSRIs, clopidogrel, dabigatran, edoxaban, erlotinib, heparins, iloprost, pentoxifylline, prasugrel, venlafaxine. Increased side effects w/ aspirin, other NSAIDs. Increased risk of toxicity of baclofen, lithium, MTX. Increased risk of nephrotoxicity w/ ciclosporin, penicillamine, tacrolimus. Increased risk of GI bleeding & ulceration w/ corticosteroids, nicorandil. Enhanced anticoagulant effect of coumarins, phenindion. Increased risk of nephrotoxicity & antagonized diuretic effect w/ diuretics. Increased side effects & haemorrhage w/ ketorolac. Reduced renal excretion of pemetrexed. Antagonized diuretic effect of K canrenoate. Increased risk of convulsions w/ quinolones. Increased plasma conc by ritonavir. Enhanced effects of sulfonylureas. Increased haematological toxicity w/ zidovudine. Avoid high doses w/ mifamurtide.