Medication Safety Screening in Psychedelic Care

An overview of what screening involves, written for people who want to understand the process rather than to perform it. Nothing here is a protocol, and nothing here is medical advice.

Why screening carries so much of the risk

Psychedelic-assisted care concentrates its risk at the edges — before the session and after it — far more than most people expect. The session itself is supervised, resourced, and attended. The medication history is often none of those things: it is taken once, at intake, from memory, by whoever is free.

Most of the avoidable harm in this field is a screening problem wearing a session-day costume.

What a careful screen actually looks at

The complete list, not the reported list. People under-report. They forget the supplement, the sleep aid, the medication they take only sometimes, the one prescribed by a different clinician. A pharmacist's habit is to ask the same question three ways.

Serotonergic load. SSRIs, SNRIs, tricyclics, lithium, triptans, tramadol, St John's wort, and more. The question is rarely a single interaction; it is a cumulative burden that no one drug on the list would create alone.

Monoamine oxidase inhibitors. A small class with an outsized capacity to turn a plan into an emergency, and the reason that ayahuasca — which contains reversible MAO inhibitors of its own — sits in a different risk category from psilocybin.

Cardiovascular considerations. Blood pressure, existing cardiac history, QT-prolonging agents already in play.

Hepatic and renal function, because metabolism is where individual variation lives.

Tapering. Whether a taper is being considered, who is supervising it, and how long a washout would need to be. This is a prescriber's decision, made with the person, and it belongs to their treating clinician.

The thing I will not do

I do not tell anyone to stop, reduce, or change a medication. Not on this site, not in conversation, not ever. That decision belongs to the person and their prescriber, inside a care relationship, and a pharmacist's job in it is to inform the conversation, not to substitute for it.

If you have read anywhere — here or elsewhere — that psychedelics let people come off their medication, treat that as a claim to be checked with your own prescriber, not as guidance.

What informed people ask their own clinicians

• What is on my list that is serotonergic, and what does that add up to?
• Is anything I take an MAO inhibitor, or does it act like one?
• If a washout were needed, how long, and who would supervise it?
• What would you want to know if something went wrong during a session?

Where this fits in my own work

I consult on the pharmacology side of care for a legal psilocybin retreat: medication-safety screening, interaction and contraindication review, and coordination with each client\u2019s own healthcare team. In 2024 that included a full medication interaction review for a participant taking an anticoagulant. Any change to a medication remains the decision of that person\u2019s own prescriber. Education and safety, not treatment. I do not run sessions, and I do not provide therapy.

Education, not medical advice. Access decisions must be made by licensed prescribers within a patient-care relationship and in accordance with applicable law.