Bismuth Subsalicylate (Pepto-Bismol) and Ketamine Therapy | Tovani Health
Pepto-Bismol (Bismuth Subsalicylate) (also: Kaopectate) — OTC antidiarrheal / antacid / mild antimicrobial
Verdict at Tovani Health
Fully compatible; no meaningful interaction.
Bismuth subsalicylate and ketamine have no clinically significant interaction. The salicylate component is mild and at standard OTC doses doesn't contribute meaningful anti-platelet activity. Black stools and black tongue are harmless cosmetic side effects of bismuth itself.
If you take Pepto-Bismol 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 Pepto-Bismol interacts with ketamine
Bismuth has mild antimicrobial, anti-inflammatory, and antisecretory effects in the GI tract. Salicylate is absorbed and metabolized like aspirin but at much lower equivalent dose. No CYP interactions of clinical significance with ketamine.
What we do at intake
Continue as needed. The black tongue/stool reaction is harmless.
Bottom line
Bismuth subsalicylate and ketamine have no clinically significant interaction. The salicylate component is mild and at standard OTC doses doesn't contribute meaningful anti-platelet activity. Black stools and black tongue are harmless cosmetic side effects of bismuth itself.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Pepto-Bismol (Bismuth Subsalicylate) 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 19, 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.