⚠️
Major drug interaction. This ingredient has clinically significant drug interactions. See Drug Interactions below before use.
SAFE

5-htp

Triptans
Possibly Safe V1 Verified
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PubMed Studies
87
PubChem CID
About

Serotonin syndrome risk. Avoid combination.

How it works (mechanism of action)

Direct serotonin precursor bypassing rate-limiting tryptophan hydroxylase step. Decarboxylated to serotonin by AAAD ubiquitously in gut and brain. In pinealocytes converted to melatonin via AANAT and ASMT. Crosses blood-brain barrier via large neutral amino acid transporter.

📊 Effectiveness
Sleep quality
Evidence Grade B · 14 studies · n=1,400
Possibly Effective
Depression
Evidence Grade B · 12 studies · n=1,200
Possibly Effective
Appetite control
Evidence Grade B · 10 studies · n=880
Possibly Effective

Evidence grades: A=Strong RCT evidence · B=Good clinical trials · C=Limited trials · D=Preliminary/traditional

👥 Safety by Population
PopulationSafety RatingMax Safe Dose
GeneralPossibly safeNot established
PregnancyPossibly safeNot established
ElderlyPossibly safeNot established
🚫 Contraindications & Warnings

Consult a healthcare professional before use if pregnant, breastfeeding, taking prescription medications, or if you have a medical condition. Keep out of reach of children.

💊 Drug Interactions (7)
🔴 SSRIs (fluoxetine, sertraline)
Major
Antidepressants
Management: Absolutely contraindicated with any serotonergic medication.
🔴 MAOIs
Major
Antidepressants
Management: Absolutely contraindicated. 14-day washout required.
🔴 Tramadol
Major
Opioid analgesics
Management: Contraindicated with tramadol.
🔴 SSRIs
Major
Antidepressant
Management: Contraindicated with SSRIs, MAOIs, and tramadol.
🔴 Triptans
Major
Antimigraine
Management: Avoid combination.
🟡 Methyldopa
Moderate
Antihypertensives
Management: Avoid combination.
🟡 Carbidopa
Moderate
Parkinson's medications
Management: Only under strict medical supervision.
🏷️ Other Names
Triptans
Updated: 2026-04-11
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