Risperidone (Risperdal) and Ketamine Therapy | Tovani Health
Risperdal (Risperidone) — Atypical antipsychotic
Verdict at Tovani Health
Compatible; D2 blockade may attenuate antidepressant response, watch QT and BP.
Risperidone and ketamine are compatible. As with other antipsychotics, D2 antagonism may partially blunt the antidepressant effect of ketamine. Additional considerations: risperidone prolongs QT modestly and can cause orthostatic hypotension, both worth knowing before a session.
If you take Risperdal regularly and are considering at-home ketamine therapy, the combination is safe with monitoring or dose adjustment. This page covers the brief pharmacologic context and what we do at intake.
How Risperdal interacts with ketamine
Risperidone is a potent D2 and 5-HT2A antagonist with modest QT effects and alpha-1 blockade that drives orthostasis. Ketamine transiently raises BP and HR; the orthostatic recovery period after a session can be more pronounced on risperidone.
What we do at intake
Disclose dose and any recent changes. Baseline EKG if over 50 or on other QT agents. We have you stand up slowly and stay seated for several minutes after each session.
Bottom line
Risperidone and ketamine are compatible. As with other antipsychotics, D2 antagonism may partially blunt the antidepressant effect of ketamine. Additional considerations: risperidone prolongs QT modestly and can cause orthostatic hypotension, both worth knowing before a session.
Frequently Asked Questions
Will risperidone block ketamine from working?
Not block, but it may modestly attenuate the response. We track this with mood scoring across sessions.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Risperdal (Risperidone) 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.
- Pharmacodynamic Interactions Between Ketamine and Psychiatric Medications Used in the Treatment of Depression: A Systematic Review. Veraart JKE, Smith-Apeldoorn SY, Bakker IM, et al.. International Journal of Neuropsychopharmacology. 2021. PMID: 34170315
Systematic review of pharmacodynamic interactions between ketamine and psychiatric medications used in depression treatment.
- Real-world effectiveness of ketamine in treatment-resistant depression: A systematic review & meta-analysis. Alnefeesi Y, Chen-Li D, Krane E, et al.. Journal of Psychiatric Research. 2022. PMID: 35688035
Meta-analysis of 2,665 patients across 79 studies — 45% response and 30% remission with ketamine in treatment-resistant depression.
Clinically reviewed
Reviewed by Benjamin Soffer, DO on May 15, 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.