MAJOR — Use With Caution
DANGEROUS — do not combine serotonin precursors with serotonergic drugs
Evidence level: MODERATE
5-HTP floods your brain with serotonin while amitriptyline prevents its removal — high serotonin syndrome risk.
5-HTP is a direct serotonin precursor. TCAs inhibit serotonin reuptake. Combined: excessive serotonin accumulation risking serotonin syndrome.
Do not take 5-HTP with any tricyclic antidepressant.
Take 5-HTP on an empty stomach between meals for optimal absorption — amino acids compete with dietary protein for transport. Amitriptyline follows its prescribed schedule. Space them at least 1 hour apart.
High 5-HTP doses, concurrent other serotonergic agents
Serotonin syndrome: agitation, tremor, hyperthermia, rapid heart rate, diarrhea
Inform doctor about all supplements including 5-HTP.
Discuss safer alternatives with your healthcare provider. They can recommend substitutions based on your specific health goals while minimizing interaction risks. Always bring a complete list of everything you take to your appointments.
5-HTP floods your brain with serotonin while amitriptyline prevents its removal — high serotonin syndrome risk.
Take 5-HTP on an empty stomach between meals for optimal absorption — amino acids compete with dietary protein for transport. Amitriptyline follows its prescribed schedule. Space them at least 1 hour apart.
Serotonin syndrome: agitation, tremor, hyperthermia, rapid heart rate, diarrhea
Discuss safer alternatives with your healthcare provider. They can recommend substitutions based on your specific health goals while minimizing interaction risks. Always bring a complete list of everything you take to your appointments.
Inform doctor about all supplements including 5-HTP.
Or browse the full interaction database (121,000+ pairs).