Safely Buy Pepto Bismol ( Bismuth subsalicylate - non Rx ) from Canada Prescriptions Plus.

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Pepto Bismol

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Pepto Bismol is a medicine used to relieve gastrointestinal upset and prevent traveler’s diarrhea.

Bismuth subsalicylate is broken down into two compounds in the stomach which help support your gastrointestinal health: bismuth and salicylic acid. The salicylate is absorbed into your bloodstream while the bismuth salt remains in your gastrointestinal tract to provide antimicrobial activity. These actions allow Pepto Bismol to prevent diarrhea caused by bacterial infections.

Pepto Bismol helps manage and treat gastrointestinal discomfort and traveler’s diarrhea. Thanks to its activity in your stomach and body, it also promotes the healing of stomach ulcers and can reduce inflammation to relieve discomfort.

Uses and Dosage

Take Pepto Bismol as directed on the packaging label or as prescribed by your doctor.

  • Take with or without food
  • Shake the liquid before measuring your dose
  • Use a dosing syringe or medicinal dose-measuring device
  • Stay hydrated while taking Pepto Bismol
  • Take 30mL every half hour as needed to relieve diarrhea
  • Take 30mL every half hour as needed for gastrointestinal upset
  • Do not take more than 8 doses within 24 hours
  • Speak with your doctor if diarrhea continues after 2 days of using Pepto Bismol
  • Tell medical professionals you take bismuth subsalicylate because it can affect some test results
  • Store at room temperature away from moisture. Do not freeze

Side Effects

Pepto Bismol may cause some side effects as it interacts with your gastrointestinal tract to ease discomfort and prevent traveler’s diarrhea. Speak with your doctor for more information regarding any symptoms you may encounter.

Common Pepto Bismol side effects:

  • Constipation
  • Dark coloured stools

Bismuth subsalicylate may cause your tongue to darken or turn black. This is a harmless side effect.

Serious Side Effects

Some more serious side effects may occur when taking Pepto Bismol. Stop using it and see your doctor right away if you notice any of the following symptoms:

  • Behavioural changes with nausea and vomiting
  • Hearing loss or ringing ears
  • Diarrhea lasting more than 2 days
  • Worsened stomach symptoms

Allergic Reactions

Do not use Pepto Bismol if you are allergic to bismuth subsalicylate or other salicylates such as aspirin. If you develop symptoms of an allergic reaction, stop using this medicine and call your doctor right away.

Pepto Bismol allergy symptoms may include:

  • Hives
  • Difficulty breathing
  • Swelling in face or throat


Avoid using Pepto Bismol if you have bleeding problems, blood in your stools, or if you are allergic to aspirin or other salicylates.

Do not use Pepto Bismol to treat a stomach ulcer unless it is caused by H. pylori and your doctor has prescribed it as part of a treatment plan.

Do not give this medicine to a child or teenager with a fever, flu symptoms, of chickenpox.

Consult with your doctor to determine the safety of taking Pepto Bismol if you have a fever or mucus in your stools.

Ask your doctor before taking any other antacid or diarrhea medication. Consult with your doctor about taking any medication that may contain a salicylate such as aspirin, salsalate, or magnesium salicylate.

Some medications can interact with bismuth subsalicylate and cause side effects. Speak with your doctor before using Pepto Bismol with any other medications, especially the following:

  • Arthritis medication
  • Gout medicine
  • Insulin or oral diabetes medications
  • Blood thinner

Tell your doctor about all medicines you take, including over the counter medications, vitamins, and herbal products.

Ask your doctor before taking Pepto Bismol while pregnant or breastfeeding.

Do not give this medicine to anyone under the age of 12 without advice from a doctor.

Form and Strength

This medicine is available in liquid form.

Pepto Bismol strength:

  • 17.6mg per mL

This liquid Pepto Bismol is available in quantities of 480mL.


How long will your stool be dark for after taking Pepto Bismol?

A common side effect of Pepto Bismol is dark coloured stools. This can last for several days after your last dose of the medicine while it works out of your system. Thankfully this is not a serious or dangerous side effect and should disappear after a few more days.

Should I take Pepto Bismol with or without food?

You can take Pepto Bismol without regard of food. Thanks to this, you can take a dose of Pepto Bismol whenever you need to relieve diarrhea or stomach upset. Use this medicine as directed on the label or as prescribed by your doctor.

Can I refrigerate Pepto Bismol?

Yes, you can keep Pepto Bismol in your fridge; doing so may make your doses more enjoyable. When refrigerating Pepto Bismol, make sure that it does not freeze. If you store it elsewhere, try to ensure the medicine is not exposed to temperatures above 40 degrees Celsius.



Additional information

Brand Name:

Pepto Bismol

Scientific Name:

Bismuth subsalicylate – non Rx

Other Names:

Pepto Bismol



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