Psilocybin and trazodone

Reduces effects

Antidepressant, SARI · also: desyrel, molipaxin, oleptro

Trazodone, even at low sleep doses, is expected to blunt a mushroom experience and add sedation, though the pair has not been studied.

Blunts the experience and adds heavy sedation.

Claims re-checked against the cited sources: 2026-10-13

Why it happens

Trazodone has dose-dependent actions: at low hypnotic doses it blocks 5-HT2A, histamine H1 and alpha-1 adrenergic receptors, and at higher doses it also blocks the serotonin transporter. Because psilocybin's effects depend on 5-HT2A activation, a 5-HT2A antagonist is expected to reduce them. Its label also carries a general serotonin syndrome warning when combined with other serotonergic drugs.

What is known

Based on the mechanism, plus consistent report. Not formally studied with psilocybin.

2009: Trazodone is hypnotic at low doses through blockade of 5-HT2A, H1 and alpha-1 receptors; higher doses add serotonin transporter blockade. Stahl, CNS Spectrums 2009 (abstract via publisher record)
2026: The US label describes trazodone as both a serotonin reuptake inhibitor and a 5-HT2 receptor antagonist and warns of increased serotonin syndrome risk with other serotonergic agents. Trazodone hydrochloride tablet US prescribing information, DailyMed
1998: In healthy volunteers, psilocybin's effects were blocked dose-dependently by the 5-HT2A antagonist ketanserin. Vollenweider et al., NeuroReport 1998

Safety guidance

People often forget that a sleep dose of trazodone is still a 5-HT2A blocker; expect weaker effects.
Do not redose to overcome the blunting.
Expect added drowsiness, and avoid driving or being alone near hazards.
Do not change your trazodone dose for a trip without your prescriber.

Do not stop a prescribed medication on your own. Stopping or skipping a prescribed drug to take mushrooms can be more dangerous than either alone. Talk to whoever prescribes it.

When to seek help

Get urgent help for fainting, a very slow or irregular heartbeat, extreme drowsiness, or confusion with fever, sweating and muscle jerking. Emergency red flags.

Common questions

I only take trazodone for sleep. Does it matter?

Yes. Low sleep doses are exactly where its 5-HT2A blocking action is most prominent, so mushrooms may feel weaker.

Is serotonin syndrome a risk?

The trazodone label warns about it with serotonergic drugs in general. With psilocybin it is not documented, and psilocin does not release serotonin.

Should I skip trazodone the night before?

Discuss any change with your prescriber; it has not been studied with psilocybin.

Sources

[1]Stahl, 'Mechanism of action of trazodone: a multifunctional drug' (2009)

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