MAJOR — Use With Caution
DANGEROUS — avoid combining
Evidence level: MODERATE
5-HTP with nortriptyline risks serotonin syndrome.
5-HTP is a direct serotonin precursor. TCAs are serotonergic. Combined: serotonin syndrome risk.
Do not combine 5-HTP with tricyclic antidepressants.
Take 5-HTP on an empty stomach between meals for optimal absorption — amino acids compete with dietary protein for transport. Nortriptyline follows its prescribed schedule. Space them at least 1 hour apart.
High doses, concurrent serotonergic agents
Serotonin syndrome symptoms
Disclose all supplements to prescriber.
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 with nortriptyline risks serotonin syndrome.
Take 5-HTP on an empty stomach between meals for optimal absorption — amino acids compete with dietary protein for transport. Nortriptyline follows its prescribed schedule. Space them at least 1 hour apart.
Serotonin syndrome symptoms
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.
Disclose all supplements to prescriber.
Or browse the full interaction database (121,000+ pairs).