Long-term treatment & co-administration w/ CYP3A4 inhibitors (eg, ritonavir, atazanavir, clarithromycin, indinavir, itraconazole, nelfinavir, saquinavir, ketoconazole, telithromycin). Non-K sparing diuretics (loop or thiazide diuretics), xanthine derivatives, glucocorticosteroids. L-dopa, L-thyroxine, oxytocin, alcohol can impair cardiac tolerance towards β2-sympathomimetics. Concomitant use w/ MAOIs, furazolidone & procarbazine may precipitate hypertensive reactions. Concomitant use w/ anaesth & halogenated hydrocarbons can elevate risk of arrhythmias. Additive effects w/ β-adrenergics. Increase risk of arrhythmias w/ digitalis glycosides. Administer w/ extreme caution to patients concomitantly taking TCAs or MAOIs & during the immediate 2 wk period following discontinuation. Increased risk of ventricular arrhythmias w/ phenothiazines, quinidine, disopyramide,...
... Show more