Pepto-Bismol Liquid is a widely recognized, pink over-the-counter medication used to treat five core digestive symptoms: nausea, heartburn, indigestion, upset stomach, and diarrhea.
Its active ingredient is bismuth subsalicylate (525 mg per 30 mL dose), which works by coating the stomach lining, neutralizing minor irritants, and exerting mild antibacterial properties to firm up loose stools.
Standard Dosage & Usage Guidelines
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Who it is for: Adults and children 12 years of age and older. Do not give standard Pepto-Bismol to younger children or teenagers recovering from chickenpox or flu due to the risk of a rare but serious condition called Reye's syndrome.
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How much to take: The standard dose is 30 mL using the provided measuring cup.
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Frequency: You can repeat the dose every 30 to 60 minutes as needed.
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Maximum limit: Do not exceed 8 doses (240 mL) within a 24-hour period.
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Duration: Limit self-treatment to a maximum of 2 days. If your symptoms last longer or get worse, you should consult a doctor.
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Preparation: Always shake the bottle well before pouring your dose.
Common Side Effects & Warnings
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Darkened Tongue or Stool: A completely harmless, temporary side effect is the darkening or blackening of your tongue or stool. This happens when bismuth mixes with trace amounts of sulfur in your digestive tract and will go away once you stop taking the medication.
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Salicylate Allergy: Because it contains salicylates, you should avoid Pepto-Bismol if you are allergic to aspirin.
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Contraindications: Do not take this medication if you have an active stomach ulcer, bleeding disorders, or bloody/black stools prior to taking the medicine.
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Pregnancy & Breastfeeding: Consult your healthcare professional before use, as it is generally contraindicated or requires strict medical supervision during pregnancy.
Formats & Local Availability
While the classic pink liquid is the most famous, Pepto-Bismol is available in several variations:
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Pepto-Bismol Ultra Liquid: A 2x concentrated formula requiring a smaller 15 mL dose.
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Solid Alternatives: Chewable tablets, swallowable caplets, and LiquiCaps for easier on-the-go dosing.
