Standard Pepto-Bismol Tablet Dosage

The standard dose of Pepto-Bismol tablets is two tablets every 30 minutes to one hour, up to eight doses in 24 hours. Each regular-strength tablet contains 262 milligrams of bismuth subsalicylate, the active ingredient that reduces stomach acid and kills some bacteria that cause diarrhea and upset stomach.

Do not exceed eight doses in a single day unless a doctor tells you to. If your symptoms do not improve after two days, or if you have bloody stools or severe abdominal pain, stop taking Pepto-Bismol and contact a healthcare provider. These can be signs of a more serious condition that needs different treatment.

Key Takeaways

  • Adults and children 12 and older take two tablets every 30 minutes to one hour, with a maximum of eight doses per day.
  • Children ages 6 to 11 should take one tablet every 30 minutes to one hour, also capped at eight doses daily.
  • Do not give Pepto-Bismol tablets to children under 6 years old without talking to a doctor first.
  • Stop taking Pepto-Bismol and call a doctor if symptoms last more than two days or if you see blood in your stool.
  • Pepto-Bismol can turn your tongue and stool black or dark gray — this is normal and harmless.

Dosage for Children Ages 6 to 11

Children in this age group should take one tablet every 30 minutes to one hour, with the same eight-dose-per-day limit as adults. A child's smaller body processes medication differently, so the lower dose is important for safety.

Watch for any signs that the dose is too strong — nausea, ringing in the ears, or confusion are rare but possible. If your child shows any of these symptoms, stop the medication and call your pediatrician or poison control.

What to Do for Children Under 6

Pepto-Bismol tablets are not recommended for children under 6 years old. The tablet form is difficult for very young children to swallow safely, and the dosage cannot be adjusted precisely enough.

If your child under 6 has diarrhea or an upset stomach, talk to your pediatrician about alternatives. Liquid formulations exist, but dosing depends on your child's exact age and weight, and a doctor needs to approve it. For most cases of mild diarrhea in young children, keeping them hydrated with water, breast milk, or an oral rehydration solution like Pedialyte is the first step.

Timing and Food Interactions

You can take Pepto-Bismol tablets with or without food. Taking them with food may reduce any stomach upset the medication itself causes, though this is uncommon. Chew the tablets or let them dissolve in your mouth rather than swallowing them whole — this helps the medication work faster.

Do not take Pepto-Bismol within two hours of taking other medications, especially antibiotics or blood thinners. Bismuth subsalicylate can interfere with how your body absorbs or processes other drugs. If you take any regular medications, ask a pharmacist or doctor before starting Pepto-Bismol.

When Pepto-Bismol May Not Be Safe

Do not take Pepto-Bismol if you are allergic to salicylates (the same ingredient family as aspirin), if you have a bleeding disorder, or if you are taking blood thinners like warfarin. Bismuth subsalicylate can increase bleeding risk in people on these medications.

Pregnant women should check with their doctor before taking Pepto-Bismol, especially in the third trimester. People with kidney disease or gout should also talk to a doctor first, because bismuth can accumulate in the body or trigger gout attacks. If you have any chronic health condition or take prescription medications regularly, a quick call to your pharmacist can confirm whether Pepto-Bismol is safe for you.

Side Effects and What Is Normal

The most common side effect is a black or dark gray tongue and dark stools. This happens because bismuth subsalicylate turns dark when it mixes with sulfur compounds in your mouth and digestive tract. It looks alarming but is completely harmless and goes away once you stop taking the medication.

Constipation can occur, especially if you take Pepto-Bismol for more than two days. Nausea, ringing in the ears, or confusion are rare but mean you should stop taking it and contact a doctor. Severe allergic reactions — rash, difficulty breathing, or swelling of the face or throat — require emergency care.

When to Call a Doctor Instead

Pepto-Bismol works for mild, short-term stomach upset and diarrhea. It is not the right choice if you have bloody stools, severe abdominal pain, high fever, or diarrhea that lasts more than two days. These symptoms point to an infection or condition that needs a doctor's diagnosis and treatment.

If you have been vomiting and cannot keep fluids down, or if you feel dizzy or faint, do not rely on over-the-counter medication — call a doctor or go to an urgent care clinic. Dehydration from prolonged vomiting or diarrhea can become serious quickly, especially in children and older adults.

Frequently Asked Questions

Can I take Pepto-Bismol every day?

No. Pepto-Bismol is meant for short-term relief of occasional stomach upset or diarrhea, not daily use. Taking it every day can lead to bismuth buildup in your body and increase the risk of side effects. If you have ongoing digestive problems, see a doctor to find out what is causing them.

Is it okay to take Pepto-Bismol with ibuprofen or acetaminophen?

Pepto-Bismol contains salicylate, which is related to aspirin. Taking it with ibuprofen increases your risk of stomach bleeding. Acetaminophen is safer to combine with Pepto-Bismol, but wait at least two hours between doses of different medications to be safe. Ask a pharmacist if you are unsure.

Why did my stool turn black after taking Pepto-Bismol?

Bismuth subsalicylate reacts with sulfur in your digestive tract and turns black. This discoloration is harmless and normal. It will go away within a few days of stopping the medication. If your stool is black and you have not taken Pepto-Bismol, that is different and warrants a doctor's attention.

Can I take Pepto-Bismol if I am breastfeeding?

Small amounts of bismuth pass into breast milk, but the amount is generally considered low risk. Still, talk to your doctor or lactation consultant before taking it regularly. For a single dose to treat acute diarrhea, most doctors say it is probably safe, but individual situations vary.

What should I do if I took too much Pepto-Bismol?

Taking more than the recommended dose can cause ringing in the ears, confusion, or rapid breathing. Call poison control at 1-800-222-1222 (in the United States) or your local emergency number. Have the bottle in front of you so you can tell them how much you took and when.