Phentermine (Adipex) and Ketamine Therapy | Tovani Health
Adipex-P (Phentermine) (also: Lomaira) — Sympathomimetic anorectic (weight loss stimulant)
Verdict at Tovani Health
Compatible; the cardiovascular stacking matters more than with milder stimulants.
Phentermine and ketamine are compatible with monitoring. Phentermine raises BP and HR meaningfully, often more than typical ADHD stimulants, and that stacks with ketamine's transient pressor effect. Baseline cardiovascular assessment matters.
If you take Adipex-P 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 Adipex-P interacts with ketamine
Phentermine releases norepinephrine and dopamine, producing appetite suppression and significant cardiovascular activation. Combined with ketamine's sympathomimetic effect, the cardiovascular axis stacks more than with milder stimulants.
What we do at intake
Disclose dose, prescriber, and indication (weight loss, off-label other). Baseline EKG and BP check. We often ask you to skip the dose on session days.
Bottom line
Phentermine and ketamine are compatible with monitoring. Phentermine raises BP and HR meaningfully, often more than typical ADHD stimulants, and that stacks with ketamine's transient pressor effect. Baseline cardiovascular assessment matters.
Frequently Asked Questions
Can I do KAP while on phentermine for weight loss?
Often yes, with a baseline cardiovascular check. We may ask you to skip phentermine on session days.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Adipex-P (Phentermine) 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.
- Blood pressure safety of subanesthetic ketamine for depression: A report on 684 infusions. Riva-Posse P, Reiff CM, Edwards JA, et al.. Journal of Affective Disorders. 2018. PMID: 29525051
684-infusion case series documenting transient blood pressure elevation as the most common cardiovascular effect of subanesthetic ketamine; no serious adverse cardiovascular events.
- 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.
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.