Hydroxyzine (Vistaril, Atarax) and Ketamine Therapy | Tovani Health
Vistaril (Hydroxyzine) (also: Atarax) — First-generation antihistamine / anxiolytic (H1 antagonist)
Verdict at Tovani Health
Compatible; sedation stacks with ketamine, QT is hydroxyzine's intrinsic profile.
Hydroxyzine and ketamine are compatible. At anxiolytic doses (25-50 mg), the main consideration is additive sedation — that's a true ketamine stack. Hydroxyzine carries an FDA-recognized QT-prolongation warning at higher doses, but that's intrinsic to hydroxyzine; ketamine at psychiatric doses isn't a meaningful QT-prolonging drug per the published literature. Baseline EKG is reasonable for hydroxyzine's own QT history above 50 mg or with other QT agents.
If you take Vistaril 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 Vistaril interacts with ketamine
Hydroxyzine is a strongly sedating H1 antagonist with anxiolytic properties. Its QT prolongation is dose-dependent and intrinsic; this is not amplified by ketamine. The clinical stack with ketamine is sedation only.
What we do at intake
Disclose dose and reason (anxiety, sleep, itching). Baseline EKG if you are over 60, on other QT agents, or taking hydroxyzine above 50 mg. We schedule mornings if you take it at bedtime.
Bottom line
Hydroxyzine and ketamine are compatible. At anxiolytic doses (25-50 mg), the main consideration is additive sedation — that's a true ketamine stack. Hydroxyzine carries an FDA-recognized QT-prolongation warning at higher doses, but that's intrinsic to hydroxyzine; ketamine at psychiatric doses isn't a meaningful QT-prolonging drug per the published literature. Baseline EKG is reasonable for hydroxyzine's own QT history above 50 mg or with other QT agents.
Frequently Asked Questions
Can I use hydroxyzine for anxiety during KAP?
Yes, at standard doses. It is a reasonable non-benzodiazepine choice if you find yourself anxious between sessions.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Vistaril (Hydroxyzine) 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.
- Ketamine: A Review of Clinical Pharmacokinetics and Pharmacodynamics in Anesthesia and Pain Therapy. Peltoniemi MA, Hagelberg NM, Olkkola KT, Saari TI.. Clinical Pharmacokinetics. 2016. PMID: 27028535
Comprehensive clinical pharmacokinetics/pharmacodynamics review of ketamine including CYP-mediated drug interactions (CYP3A4, CYP2B6).
Clinically reviewed
Reviewed by Benjamin Soffer, DO on May 16, 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.