CONCURRENT USE WITH CHLOROQUINE, QUINIDINE OR QUININE CAUSES AN INCREASED RISK OF CONVULSIONS AND CARDIAC TOXICITY. HALOFANTRINE, BETABLOCKERS, TRICYCLIC ANTIDEPRESSANTS, CALCIUM CHANNEL BLOCKERS, DIGITALIS, PHENOTHIAZINES IN COMBINATION OR AFTER MAFLOQUIN MAY CAUSE HADARDOUS CARDIAC ARRHYTHMIAS.