Kahn R S, Westenberg H G
J Affect Disord. 1985 Mar-Apr;8(2):197-200. doi: 10.1016/0165-0327(85)90046-1.
Ten outpatients suffering from anxiety states (Anxiety Disorders: DSM-III) were treated with L-5-hydroxytryptophan and carbidopa. A significant reduction in anxiety was observed on three different anxiety scales. It is suggested that 5-HT systems may be involved in the mediation of anxiety.