5-HTP / L-tryptophan interactions on FDA labels
These are pairs with 5-HTP / L-tryptophan where an FDA label names an interaction, grouped by the desk's grade. A drug that isn't listed here hasn't been cleared as safe with 5-HTP / L-tryptophan; it just isn't on this list. Open any pair in the desk to see it alongside other drugs.
Open 5-HTP / L-tryptophan in the desk
Avoid together
- 5-HTP / L-tryptophan and Tranylcypromine
Why this grade
Parnate (tranylcypromine) label, Contraindications
The Parnate (tranylcypromine) label lists this combination under Contraindications. 4.1 Combination with Certain Drugs: "Concomitant use of PARNATE or use in rapid succession with the products in Table 1 is contraindicated … hydroxytryptophan" Named in the label: "hydroxytryptophan" Retrieved from DailyMed 2026-10-19.
Open source
Educational reference only. Not FDA-cleared. The Prescribing Information governs.
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