Fluconazole (Diflucan) and Ketamine Therapy | Tovani Health
Diflucan (Fluconazole) — Triazole antifungal (CYP3A4 inhibitor)
Verdict at Tovani Health
Compatible with awareness; CYP3A4 inhibition can modestly raise ketamine levels.
Fluconazole and ketamine are compatible with awareness. Fluconazole is a moderate CYP3A4 inhibitor and a strong CYP2C9 inhibitor. The CYP3A4 piece is what matters for ketamine: a single 150 mg fluconazole dose (common for yeast infection) has minimal practical effect, but chronic or higher-dose courses can meaningfully raise ketamine exposure. We adjust expectations and dose rather than refuse the combination.
If you take Diflucan 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 Diflucan interacts with ketamine
Fluconazole inhibits CYP3A4 (moderate) and CYP2C9 (strong). Ketamine relies on CYP3A4 and CYP2B6 for clearance. Net effect is dose-dependent slowing of ketamine metabolism; clinical magnitude is small at single doses, larger with multi-week regimens.
What we do at intake
Disclose dose, duration, and indication. Single-dose treatment (one 150 mg pill for yeast infection) is fine. Multi-week or high-dose regimens (oral candidiasis, prophylaxis, systemic fungal infection) get individual evaluation.
Bottom line
Fluconazole and ketamine are compatible with awareness. Fluconazole is a moderate CYP3A4 inhibitor and a strong CYP2C9 inhibitor. The CYP3A4 piece is what matters for ketamine: a single 150 mg fluconazole dose (common for yeast infection) has minimal practical effect, but chronic or higher-dose courses can meaningfully raise ketamine exposure. We adjust expectations and dose rather than refuse the combination.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Diflucan (Fluconazole) 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 Anesthetic and Pain Therapy. Peltoniemi MA, Hagelberg NM, Olkkola KT, Saari TI. Clinical Pharmacokinetics. 2016. PMID: 27028535
Reviews CYP3A4 inhibitor effects on ketamine clearance.
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.