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USES AND ACTIONS Tryptophan is an essential amino acid and precursor of serotonin. CNS depletion of serotonin is considered to be involved in depression, and tryptophan has a role in the treatment of some cases. Compounding Chemists will compound L-tryptophan or 5-HTP...


5-hydroxytryptophan is also known as oxitriptan or 5-HTP and is a precursor of serotonin. Like tryptophan, this medication is used in the treatment of depression. A prescription is required for this medication.