Bactrim (Sulfamethoxazole-Trimethoprim) and Ketamine Therapy | Tovani Health
Bactrim (Sulfamethoxazole / Trimethoprim) (also: Septra) — Sulfonamide combination antibiotic
Verdict at Tovani Health
Fully compatible with KAP.
Bactrim and ketamine have no clinically significant interaction. Used for UTIs, skin/soft tissue infections, and Pneumocystis prophylaxis. Continue your course as prescribed.
If you take Bactrim 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 Bactrim interacts with ketamine
Sulfamethoxazole and trimethoprim sequentially inhibit folate synthesis in bacteria. Trimethoprim weakly inhibits CYP2C8/9 but minimal effect on ketamine.
What we do at intake
Continue as prescribed. Disclose any sulfa allergy history (relevant for prescription planning, not KAP).
Bottom line
Bactrim and ketamine have no clinically significant interaction. Used for UTIs, skin/soft tissue infections, and Pneumocystis prophylaxis. Continue your course as prescribed.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Bactrim (Sulfamethoxazole / Trimethoprim) 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.