serotonin
4 interactions related to serotonin
fluoxetine + saffron
Saffron (Crocus sativus) has its own mild antidepressant activity, including serotonergic effects shown in randomized controlled trials. Combining a standardized saffron extract with fluoxetine theoretically adds to serotonergic tone, but augmentation trials adding saffron on top of existing antidepressants found it well tolerated, with no reported cases of serotonin syndrome. The interaction is best treated as plausible rather than documented.
niacin + tryptophan
Niacin (vitamin B3) and the amino acid tryptophan are nutritionally linked: the body can make niacin from tryptophan through the kynurenine pathway, so the two together support the NAD/NADP coenzyme pools that power energy metabolism. Adequate niacin also frees up tryptophan for serotonin and melatonin production. This is a beneficial nutritional partnership, not a hazardous interaction.
nortriptyline + st. john's wort
St. John's wort induces the liver enzymes (chiefly CYP3A4, via the pregnane X receptor) that help clear nortriptyline, which can lower nortriptyline blood levels and weaken its antidepressant effect. The herb also adds serotonergic activity, which gives an additive, theoretical increase in the risk of serotonin syndrome.
saffron + curcumin
Saffron (Crocus sativus) and curcumin (from turmeric) both have antidepressant effects through partly complementary mechanisms: saffron modulates serotonin and dopamine reuptake and increases BDNF, while curcumin reduces neuroinflammation, supports monoamine balance, and normalizes the HPA axis. A randomized, double-blind, placebo-controlled trial found a saffron plus curcumin combination significantly improved depressive symptoms versus placebo in adults with major depression.