administration of l-5-hydroxytryptophan ( 7.5-12.5 mg/kg ) to rats 30 min following pretreatment with pargyline induced wet-dog shakes which included head shake and whole body shake . p-chloroamphetamine ( pca ) ( 5 mg/kg ) alone also produced wet-dog shakes in the vehicle-pretreated rats , but pcp ( 2.5-7.5 mg/kg ) and tryptophan ( 100 mg/kg ) alone did not .
C0000578
hydroxytryptophan
C0041249
tryptophan