Increased plasma conc by troleandomycin, INH, grapefruit juice. Decreased plasma conc by rifampin, phenobarb, phenytoin. Inhibited/induced hepatic clearance w/ aprepitant, fosaprepitant, itraconazole, ketoconazole, HIV-PIs, diltiazem, OCs, carbamazepine, cyclophosphamide, tacrolimus. Mutual inhibition of metabolism w/ ciclosporin, clarithromycin, erythromycin. Enhanced/diminished effects w/ anticoagulants. Antagonized pancuronium & vecuronium neuromuscular blocking effects. Increased blood glucose conc. Aminoglutethimide-induced adrenal suppression may impede endocrine changes. Increased incidence of GI bleeding & ulceration w/ NSAIDs. Increased high-dose aspirin clearance. Development of hypokalemia w/ K-depleting agents. Antagonized diuretic & hypotensive effects. Increased risk of hypokalemia w/ cardiac glycosides. Reduced effect by mifepristone. Incompatibility w/ aminophylline, benzylpenicillin, Ca gluconate, ciprofloxacin, cisatracurium, dolasetron, filgrastim, glycopyrrolate, soluble insulin, metaraminol, ondansetron, pantoprazole, KCl, propofol, rocuronium, tigecycline.