Enhanced effects of oral anticoagulants. Increased plasma conc of lithium, MTX, & cardiac glycosides. Increased risk of nephrotoxicity w/ ACE inhibitors, ciclosporin, tacrolimus, or diuretics. Increased risk of hyperkalaemia w/ ACE inhibitors & some diuretics including K-sparing diuretics. Reduced antihypertensive effects of ACE inhibitors, β-blockers, & diuretics. Convulsions w/ quinolones. Increase effects of phenytoin & sulfonylureas. Increased risk of adverse effects w/ other NSAIDs including aspirin & misoprostol. Increased risk of GI bleeding & ulceration w/ corticosteroids, SSRIs, venlafaxine, antiplatelets, or pentoxifylline. Increased risk of haematotoxicity w/ zidovudine. May increase plasma conc w/ ritonavir. Alter efficacy of mifepristone.