Antidepressants Interactions

Some antidepressants slow how fast the body clears caffeine by inhibiting the liver enzyme CYP1A2 — fluvoxamine does this most strongly, while fluoxetine, sertraline, paroxetine, and duloxetine have milder effects. At the same time, caffeine independently worsens anxiety, insomnia, tremor, and a racing heart, the very symptoms antidepressants are often prescribed to relieve. With MAOIs, very high caffeine intake has been linked in case reports to blood pressure spikes.

Saffron's active constituents (crocin and safranal) show antidepressant-like activity in laboratory and animal studies, partly through monoamine reuptake and monoamine-oxidase inhibition. This overlaps with how SSRIs, SNRIs, and MAOIs work, raising a theoretical concern about additive serotonergic effects. In practice, human trials combining standardized saffron with fluoxetine or sertraline reported no serotonin syndrome and no serious adverse events, and there are no documented human cases from this combination.