“…There was a 50% dropout rate mainly due to severe side effects like ataxia, dizzi ness, restlessness, and confusional states resulting from the lithium-carbamazepine combination [Ghose, 1978], Lithium may prolong the neuromus cular blockage of succinylcholine, pancuronium and décaméthonium [Borden et al, 1974;Hill and Wong, 1976;Hill et al, 1977]. This interac tion is probably due to the lithium substitution for sodium ions at nerve terminals thus impeding presynaptic transmission [Carasanos, 1979], Lith ium may also increase the hypothyroid effects of iodides [Shopsin et al, 1973] and Carbimazole [Hedley et al, 1978], Methyldopa [Byrd, 1975;Osanloo and Deglin, 1980] and mazindol [Hendy et al, 1980] were reported to increase the risk of lithium toxicity and hydroxyzine may increase lith ium effects on cardiac repolarization [Hollister, 1975], Lithium can also decrease the pressor response to norepinephrine [Fann et al, 1972] and may attenuate the central nervous system stimulant, euphoric and systolic blood pressure increases of amphetamines [Angrist and Gershon, 1979].…”