EFFECT OF ALCOHOL ON CNS & CVS ENHANCED. HYPOTENSION WITH LEVODOPA, FENFLURAMINE, PHENOTHIAZINE & EPHEDRINE. PRESSOR EFFECT OF PHENYLEPHRINE & CATECHOLAMINES POTENTIATED. CNS EXCIATION WITH MAOIS. LOWERS SEIZURE THRESHOLD IN EPILEPTICS. MARKED MYOCARDIAL DEPRESSION WITH HALOTHANE. HYPOTENSIVE EFFECTS ENHANCED BY THIAZIDE DIURETICS. ENHANCE EFFECT OF SOME BETA-BLOCKERS & INCREASE RISK OF CARDIAC GLYCOSIDE TOXICITY. ANTAGONISED BY SYMPATHOMIMETIC AMINES & TRICYCLIC ANTI-DEPRESSANTS. INCREASED PROLACTIN SECRETION WITH ORAL CONTRACETIVES.