further studies relating to the possible mechanism of action of l-tryptophan indicated that infusion of 5-hydroxytryptophan represents a much more potent stimulus for the secretion of prolactin and that premedication with the serotonin antagonist , methysergide maleate , serves to blunt the effect of l-tryptophan on prolactin secretion .
C0000578
hydroxytryptophan
C0041249
tryptophan