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Tryptophan antidepressant 'physiological sedative': fact or fancy?
Psychopharmacology
|March 14, 1979
Summary
L-tryptophan, a precursor to serotonin (5-HT), shows antidepressant effects comparable to tricyclic drugs, particularly for psychomotor retardation. It also acts as a physiological sedative, especially when administered at night.
Area of Science:
- Neuroscience
- Pharmacology
- Psychiatry
Background:
- L-tryptophan is a precursor to serotonin (5-HT), a neurotransmitter implicated in mood regulation.
- Existing treatments for depression include tricyclic drugs and monoamine oxidase inhibitors (MAOIs).
Purpose of the Study:
- To review recent publications on the alleged antidepressive and sedative effects of L-tryptophan.
- To evaluate the efficacy of L-tryptophan compared to standard antidepressant therapies.
Main Methods:
- Literature review of recent publications.
- Analysis of evidence regarding L-tryptophan's effects on depression and sedation.
Main Results:
- L-tryptophan demonstrates efficacy similar to tricyclic drugs in alleviating depression symptoms, especially psychomotor retardation.
- L-tryptophan exhibits synergistic effects with MAOIs.
- L-tryptophan acts as a physiological sedative, with effects noted primarily at night when endogenous 5-HT levels peak.
Conclusions:
- L-tryptophan holds greater therapeutic potential as an antidepressant than as a sedative.
- Further research may elucidate optimal therapeutic applications and dosages.