rats pretreated with either phenelzine ( 50 mg/kg 18 h and 12 mg/kg 90 min previously ) or carbidopa ( 25 mg/kg 30 min previously ) then given tryptophan or 5-hydroxytryptophan ( 5-htp ) , developed wet-dog shakes which were more intense after 5-htp .
C0041249
tryptophan
C0000578
5-htp