Metronidazole (Flagyl) and Ketamine Therapy | Tovani Health
Flagyl (Metronidazole) — Antibiotic / antiprotozoal
Verdict at Tovani Health
Fully compatible; the disulfiram-like alcohol reaction is independent of KAP.
Metronidazole and ketamine have no clinically significant interaction. The disulfiram-like alcohol reaction is a well-known Flagyl precaution but is independent of KAP and applies whether you're in treatment or not. Alcohol is already separately incompatible with KAP for its own reasons.
If you take Flagyl regularly and are considering at-home ketamine therapy, the combination is generally safe at therapeutic doses. This page covers the brief pharmacologic context and what we do at intake.
How Flagyl interacts with ketamine
Metronidazole disrupts microbial DNA and inhibits aldehyde dehydrogenase, which is what produces the disulfiram-like reaction with alcohol. No CYP interactions of clinical significance with ketamine.
What we do at intake
Continue your course as prescribed. Avoid alcohol during the course and for 3 days after. This applies whether you do KAP or not.
Bottom line
Metronidazole and ketamine have no clinically significant interaction. The disulfiram-like alcohol reaction is a well-known Flagyl precaution but is independent of KAP and applies whether you're in treatment or not. Alcohol is already separately incompatible with KAP for its own reasons.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Flagyl (Metronidazole) 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.
Clinically reviewed
Reviewed by Benjamin Soffer, DO on May 17, 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.