Effect of a serotonin precursor and uptake inhibitor in anxiety disorders; a double-blind comparison of 5-hydroxytryptophan, clomipramine and placebo. 1987

R S Kahn, and H G Westenberg, and W M Verhoeven, and C C Gispen-de Wied, and W D Kamerbeek
Department of Biological Psychiatry, University Hospital, Utrecht, The Netherlands.

A double-blind placebo-controlled study of 5-HTP and clomipramine was carried out on 45 patients suffering from anxiety disorders (DSM-III). Clomipramine has shown to be effective in that it induced significant improvement on all rating scales as compared to placebo. 5-HTP showed a moderate reduction of the symptomatology on the 90-item symptoms checklist (SCL-90) and the State Scale of the Spielberger State-Trait Anxiety Inventory. Clomipramine and 5-HTP differed in their efficacy in that 5-HTP did not affect the associated depressive symptomatology. The results support the hypothesis that brain serotonergic pathways are involved in the pathogenesis of anxiety disorders, particularly in agoraphobia and panic disorders.

UI MeSH Term Description Entries
D008297 Male Males
D009771 Obsessive-Compulsive Disorder An anxiety disorder characterized by recurrent, persistent obsessions or compulsions. Obsessions are the intrusive ideas, thoughts, or images that are experienced as senseless or repugnant. Compulsions are repetitive and seemingly purposeful behavior which the individual generally recognizes as senseless and from which the individual does not derive pleasure although it may provide a release from tension. Anankastic Personality,Neurosis, Obsessive-Compulsive,Anankastic Personalities,Disorder, Obsessive-Compulsive,Disorders, Obsessive-Compulsive,Neuroses, Obsessive-Compulsive,Neurosis, Obsessive Compulsive,Obsessive Compulsive Disorder,Obsessive-Compulsive Disorders,Obsessive-Compulsive Neuroses,Obsessive-Compulsive Neurosis,Personalities, Anankastic,Personality, Anankastic
D010200 Panic A state of extreme acute, intense anxiety and unreasoning fear accompanied by disorganization of personality function. Panics
D011581 Psychological Tests Standardized tests designed to measure abilities (as in intelligence, aptitude, and achievement tests) or to evaluate personality traits. Parenting Stress Index,Trier Social Stress Test,Trier Stress Test,Psychologic Tests,Psychological Test,Test, Psychological,Tests, Psychological,Index, Parenting Stress,Psychologic Test,Stress Index, Parenting,Stress Test, Trier,Test, Psychologic,Test, Trier Stress,Trier Stress Tests
D002986 Clinical Trials as Topic Works about pre-planned studies of the safety, efficacy, or optimum dosage schedule (if appropriate) of one or more diagnostic, therapeutic, or prophylactic drugs, devices, or techniques selected according to predetermined criteria of eligibility and observed for predefined evidence of favorable and unfavorable effects. This concept includes clinical trials conducted both in the U.S. and in other countries. Clinical Trial as Topic
D002997 Clomipramine A tricyclic antidepressant similar to IMIPRAMINE that selectively inhibits the uptake of serotonin in the brain. It is readily absorbed from the gastrointestinal tract and demethylated in the liver to form its primary active metabolite, desmethylclomipramine. Chlorimipramine,Anafranil,Chlomipramine,Clomipramine Hydrochloride,Clomipramine Maleate (1:1),Clomipramine Monohydrochloride,Hydiphen,Hydrochloride, Clomipramine,Monohydrochloride, Clomipramine
D004311 Double-Blind Method A method of studying a drug or procedure in which both the subjects and investigators are kept unaware of who is actually getting which specific treatment. Double-Masked Study,Double-Blind Study,Double-Masked Method,Double Blind Method,Double Blind Study,Double Masked Method,Double Masked Study,Double-Blind Methods,Double-Blind Studies,Double-Masked Methods,Double-Masked Studies,Method, Double-Blind,Method, Double-Masked,Methods, Double-Blind,Methods, Double-Masked,Studies, Double-Blind,Studies, Double-Masked,Study, Double-Blind,Study, Double-Masked
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006916 5-Hydroxytryptophan The immediate precursor in the biosynthesis of SEROTONIN from tryptophan. It is used as an antiepileptic and antidepressant. 5-HTP,Hydroxytryptophan,Oxitriptan,Oxytryptophan,Tryptophan, 5-Hydroxy-,5 Hydroxytryptophan,5-Hydroxy- Tryptophan,Tryptophan, 5 Hydroxy

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