Check with a pharmacist or doctor before you take Pepto-Bismol with ibuprofen (Advil, Motrin), because the combination is not risk-free. Pepto's active ingredient, bismuth subsalicylate, is a salicylate in the aspirin family, and the NHS says it may not mix well with NSAIDs such as ibuprofen and aspirin. Ibuprofen can cause stomach bleeding, and the Pepto label says not to use it if you have an ulcer or a bleeding problem, so skip the combo without advice if you have an ulcer, a bleeding problem, take a blood thinner, or are 60 or older. Pepto can also turn your stool black, which is harmless, but black stool can also be a sign of bleeding from ibuprofen.
Why does Pepto-Bismol matter with ibuprofen?
Pepto-Bismol is not just a coating for your stomach. Its active ingredient is bismuth subsalicylate. The US Drug Facts label carries an allergy alert that says it contains salicylate, and it tells you not to take it if you are allergic to salicylates, including aspirin, or are taking other salicylate products. Each 30 mL dose of the liquid contains 261 mg of salicylate, per the label.
Ibuprofen is an NSAID. The Advil label warns that NSAIDs may cause severe stomach bleeding, and that the chance is higher if you take other drugs that contain NSAIDs, naming aspirin, ibuprofen, and naproxen. The NHS lists NSAIDs such as aspirin and ibuprofen among the medicines that may not mix well with Pepto-Bismol. Neither label gives a simple yes or no for the pair, which is why a pharmacist check is the safe step.
- Pepto-Bismol: bismuth subsalicylate, 525 mg per 30 mL dose of the liquid. Use for no more than 2 days, per the label.
- Advil (ibuprofen, also sold as Motrin): 200 mg per Advil tablet. No more than 6 tablets in 24 hours unless a doctor directs you, per the Advil label.
- The shared concern: both labels warn people with ulcers or bleeding problems, and both flag blood thinners.
Who should not combine them without asking?
The labels are clearest about these groups. If any apply to you, do not take the two together until a doctor or pharmacist says it is OK.
- You have an ulcer or a bleeding problem. The Pepto label says do not use it if you have either. The Advil label says the bleeding risk is higher if you have had stomach ulcers or bleeding problems.
- You take a blood thinner such as warfarin or apixaban. Both labels and the NHS flag anticoagulants.
- You take daily aspirin. MedlinePlus says to tell your doctor about daily aspirin before taking Pepto, and the Advil label says ibuprofen may reduce the heart attack and stroke benefit of aspirin.
- You are 60 or older, have 3 or more alcoholic drinks a day, or take a steroid such as prednisone. The Advil label lists each of these as raising bleeding risk.
- You take medicine for diabetes, gout, or arthritis. The Pepto label says to ask a doctor or pharmacist first.
- You are allergic to aspirin or other salicylates. Do not take Pepto at all.
Could the ibuprofen be causing the stomach upset?
Sometimes people reach for Pepto because ibuprofen upset their stomach. That is worth pausing on. MedlinePlus says NSAIDs like ibuprofen can cause ulcers, bleeding, or holes in the stomach or intestine, sometimes without warning signs. It says to stop ibuprofen and call your doctor if you get stomach pain or heartburn while taking it.
If your stomach pain started after you began ibuprofen, adding a salicylate on top is not the fix. Stop the ibuprofen and get advice. Pain that is new, keeps going, or keeps getting worse needs a clinician, not more over-the-counter medicine.
Is black stool from Pepto normal?
Yes, usually. The Pepto label says a temporary, harmless darkening of the stool and tongue may occur. MedlinePlus says the darkening usually goes away a few days after you stop.
The problem is that black stool is also a warning sign of bleeding in the stomach. The Advil label says to stop and ask a doctor if you have bloody or black stools, and MedlinePlus says to get emergency care for black, tarry stools. If you are taking both medicines, you cannot easily tell which one is the cause by looking. Treat black stool that comes with feeling faint, dizziness, stomach pain, or vomiting blood as bleeding until a clinician says otherwise.
One more label rule: do not start Pepto if you already have bloody or black stool.
What can I take instead?
Ask a pharmacist which choice fits you. A common option to discuss is using only one of the two. If you need a pain reliever that is not ibuprofen, ask the pharmacist whether acetaminophen (Tylenol) suits you and your other medicines.
If you take Pepto for diarrhea, drink plenty of clear fluids, as the label advises. The label says to ask a doctor before using it if you have a fever or mucus in your stool. Stop and ask a doctor if symptoms get worse, diarrhea lasts more than 2 days, or you notice ringing in your ears or hearing loss.
When should you get care?
In an emergency, call 911Call a doctor today if you have stomach pain or heartburn that does not get better, diarrhea that lasts more than 2 days or gets worse, small amounts of blood in your stool, or ringing in your ears or hearing loss after taking Pepto.
Call 911 or go to the ER if you vomit blood or something that looks like coffee grounds, have black, tarry stools or a lot of blood in your stool, feel lightheaded or dizzy from bleeding, or have severe belly pain with bleeding.
Call 911 for chest pain, trouble breathing, weakness on one side of the body, or slurred speech while taking ibuprofen, or for a swollen throat or tongue after taking either medicine.
If someone took too much of either medicine, call Poison Control at 1-800-222-1222. Call 911 if they collapse, have a seizure, have trouble breathing, or cannot be woken up.
How our AI doctor decides when to send you to care ›What about kids and teens?
Do not give Pepto-Bismol to a child or teen who has or is getting over the flu, flu-like symptoms, or chickenpox. The US label warns about Reye's syndrome, a rare but serious illness. For children under 12, the US label says to ask a doctor. The NHS goes further and says not to give it to anyone 15 or under. Ask your child's doctor before combining any stomach remedy with ibuprofen.
Common questions
Can I take Pepto-Bismol with ibuprofen?
Ask a pharmacist or doctor first. Pepto contains a salicylate in the aspirin family, and the NHS says it may not mix well with NSAIDs such as ibuprofen. Skip the combo without advice if you have an ulcer, a bleeding problem, take a blood thinner, or are 60 or older.
Does Pepto-Bismol have aspirin in it?
Not aspirin itself, but a close relative. Its active ingredient is bismuth subsalicylate, and the label warns it contains salicylate. That is why it says not to take it if you are allergic to aspirin or already take other salicylate products.
Can I take Pepto-Bismol if I take a blood thinner?
Ask your doctor or pharmacist first. The Pepto label says to ask before use if you take any drug for thinning the blood, and the NHS lists anticoagulants such as warfarin and apixaban. Adding ibuprofen raises bleeding risk further, per the Advil label.
How long should I wait between Pepto and ibuprofen?
Neither the Pepto label nor the Advil label gives a spacing time that makes the pair safe. Spacing them out does not remove the shared bleeding concern. Ask a pharmacist, who can check your other medicines and health history.
Why is my tongue black after Pepto-Bismol?
The bismuth in Pepto can darken the tongue and stool. The label calls this temporary and harmless, and it usually fades a few days after you stop. Black stool can also mean bleeding, so get care if it looks tarry or comes with dizziness, severe belly pain, or vomiting blood.
Pymander is not a replacement for a physician and does not provide medical advice, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition. If you think you may have a medical emergency, call 911.