Mescaline (Peyote, San Pedro) and Ketamine Therapy | Tovani Health
Peyote (Mescaline) (also: San Pedro Cactus) — Classical serotonergic psychedelic (5-HT2A agonist; DEA Schedule I)
Verdict at Tovani Health
Federally illegal (with Native American Church exemption for peyote); we space sessions from any active use.
Mescaline is a DEA Schedule I controlled substance. Peyote use specifically has a federal religious-use exemption for enrolled members of the Native American Church; that exemption doesn't extend to other forms of mescaline (synthetic, San Pedro extract). Same framework we apply to LSD: long duration (10-12 hours), classical psychedelic, no documented combination harm with ketamine but we space sessions for the experiential-load reason. Distant past use doesn't disqualify you.
If you take Peyote regularly and are considering at-home ketamine therapy, the combination is depends on your specific situation. This page covers the brief pharmacologic context and what we do at intake.
How Peyote interacts with ketamine
Mescaline agonizes 5-HT2A serotonin receptors, producing classical psychedelic effects. Longer duration than psilocybin or 2C-B, shorter and less intense than LSD. No documented PK interaction with ketamine.
What we do at intake
Disclose any recent mescaline or peyote use. We ask for at least 7 days between any psychedelic experience and a ketamine session. We are not an enforcement service.
Bottom line
Mescaline is a DEA Schedule I controlled substance. Peyote use specifically has a federal religious-use exemption for enrolled members of the Native American Church; that exemption doesn't extend to other forms of mescaline (synthetic, San Pedro extract). Same framework we apply to LSD: long duration (10-12 hours), classical psychedelic, no documented combination harm with ketamine but we space sessions for the experiential-load reason. Distant past use doesn't disqualify you.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Peyote (Mescaline) at intake. The eligibility check takes 5 minutes and gives you an honest answer about whether at-home ketamine fits your specific situation.
FL and NJ residents only. Benjamin Soffer, DO — Tovani Health.
Sources
The verdict and clinical guidance on this page are based on the following peer-reviewed literature and FDA prescribing information.
- Psychedelics. Nichols DE. Pharmacological Reviews. 2016. PMID: 26841800
Clinically reviewed
Reviewed by Benjamin Soffer, DO on May 19, 2026. Dr. Soffer is a board-certified physician (American Board of Internal Medicine) licensed in Florida and New Jersey, prescribing at-home ketamine therapy through Tovani Health.
This page is general information about how this medication interacts with at-home ketamine therapy at Tovani Health. It is not a substitute for medical advice from your prescribing physician about your specific situation. Always discuss medication changes with the doctor who prescribed them.