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  • Pepto-Bismol Liquid 120ml

Pepto-Bismol Liquid 120ml

From £2.52

Medication features

  • Fast effective relief from nausea, upset stomach, heartburn & indigestion
  • Forms a soothing, protective, antiseptic coating of your stomach and intestine
  • Helps to control diarrhoea
  • Also available in 480ml or 240ml bottles
  • Suitable for 16 years old and over


Pepto-Bismol Original Liquid 

Pepto-Bismol Liquid is an oral solution for heartburn, indigestion, nausea, and upset stomach.  It also helps to control diarrhoea. 

Pepto’s improved formula coats your stomach and provides fast relief for an upset stomach due to overindulgence in food and drink including: gas, belching, and fullness.

This suspension with active ingredient Bismuth Subsalicylate calms and soothes your stomach. 

For more advice, please visit us on Instagram @rightdose_uk.


Why Pepto-Bismol Can Turn Your Poop or Tongue Black

The active ingredient in Pepto-Bismol contains bismuth, and when it combines with the sulfur that is naturally present in your mouth and digestive tract, this can sometimes result in a black tongue or black poop. The amount of sulfur present in your body when you take Pepto Bismol determines if and to what extent you experience black tongue or black poop.

If you do experience either, you’ll probably notice the darkness on your tongue first since that is where the Pepto- Bismol first meets the sulfur in your body and creates a black-colored substance called bismuth sulfide. As the Pepto-Bismol moves through your digestive tract, it coats and soothes your stomach so you can get fast and effective relief from your upset stomach or diarrhea symptoms. You’ll feel better, and you won’t even realize that the bismuth sulfide formed on your tongue earlier is making its way out of your body—until you use the bathroom later and notice that your poop may be black.

If you do experience black tongue or poop after taking Pepto-Bismol, know that the discoloration is temporary and harmless, and it can last several days after you stop taking Pepto-Bismol. Individual bowel habits, your age (the intestinal tract slows down with age), and the amount of the product taken all help to determine how long the discoloration will last

We want to assure you that a great deal of work has gone into the development and testing of all Pepto Bismol products to ensure they are safe for you to use. As always, reach out to your healthcare provider if you have any concerns.

Side Effects

Before using any medication, it is important to read the Patient Information Leaflet and follow the instructions on the package.

When using this product a temporary, but harmless, darkening of the stool and/or tongue may occur.

Do not use it, if you are allergic to any of the ingredients.

  • Allergy alert: Contains salicylate.
  • Do not take if you are allergic to salicylates (including aspirin), taking other salicylate products.

Children and teenagers who have or are recovering from chicken pox or flu-like symptoms should not use this product. When using this product, if changes in behavior with nausea and vomiting occur, consult a doctor because these symptoms could be an early sign of Reye's syndrome, a rare but serious illness.

  • Ask a doctor or pharmacist before use if you are taking any drug for: anticoagulation (thinning the blood), diabetes, gout, arthritis.
  • Do not use it if you have an ulcer, a bleeding problem, bloody or black stool.
  • Ask a doctor before use if you have: fever, mucus in the stool.
  • If pregnant or breastfeeding, ask a health professional before use.
  • In case of overdose, get medical help.

Stop use and ask a doctor if: symptoms get worse or last more than 2 days, ringing in the ears or loss of hearing occurs, diarrhea lasts more than 2 days.

Keep out of reach of children.

If you get any side effects, talk to your doctor, our Rightdose pharmacists or nurse. This includes any possible side effects not listed in this leaflet.

You can help to make medicines safer by reporting any side-effects to the Yellow Card Scheme at www.mhra.gov.uk/yellowcard.



Info Leaflet

Over 100 Years of Pepto History

Pepto-Bismol provides effective relief of multiple stomach symptoms. Available in liquid, chewable tablets, and swallowable caplets.

Today, we think of how Pepto-Bismol soothes the digestive system after we've overindulged at a meal. Or, we think of it as a travel companion that can help soothe stomach upsets associated with traveler’s diarrhea. But in its early days, a different form of Pepto-Bismol did more than comfort; it actually helped treat symptoms of a more serious illness.

The formula of the pink medicine we now call Pepto-Bismol was originally developed at the start of the 20th century, when high standards of hygiene and sanitation weren't as widespread as today. Looking to cure a frightening form of cholera that caused severe diarrhea, vomiting, and sometimes death, a doctor concocted a formula in his home that proved effective against these symptoms. The formula (which was different from today's) was made from pepsin, zinc salts, salol, and oil of wintergreen, along with a colorant to make it pink, and he called it Mixture Cholera Infantum. (Researchers would later learn that this illness was caused by a bacterial infection, treatable with antibiotics.)

Over the years, studies found that bismuth subsalicylate is the ingredient that makes Pepto-Bismol work, and that is listed as the active ingredient today.

Bismosal's name was changed in 1919 to Pepto-Bismol. The name change made it easier for Norwich to promote the product for use by adults. As Pepto-Bismol, the product became Norwich's leading nonprescription drug.

Pepto-Bismol came to the Procter & Gamble Company as part of the Company's acquisition of Norwich Eaton Pharmaceuticals in 1982. It's now sold in several countries around the world.



For oral administration.

Suitable for adults 16 years old and over.

  • Shake well before use.
  • Then fill the dosing cup provided on the cap, fill it to the top, and drink up. One dose cup of Pepto-Bismol liquids equals one dose.
  • Repeat 1 dose of Pepto Bismol every half hour to hour until you feel better.
  • No more than 8 doses to be taken in 24 hours.
  • Do not exceed the stated dose or use after expiry date.

Dosing varies by Pepto Bismol formula and form, so we’ll break down what 1 dose means for each product. One dose cup of Pepto Bismol liquids equals one dose.

Just in case that dose cup goes missing, we’ll also break down how many mL of each Pepto formula equals 1 dose.

  • Original Strength Liquid: 30 mL equals 1 dose.
  • Ultra-Strength Liquid: 15 mL equals 1 dose.
  • Pepto Diarrhea Liquid: 10 mL equals 1 dose.

Tip: Pepto Bismol liquids do not need to be refrigerated, but some say it tastes better when cold. Pepto Bismol is just as effective when stored at room temperature or in the fridge—so the choice is up to you!

Drink plenty of clear fluids to help prevent dehydration caused by diarrhoea.


Do not take anything containing aspirin while taking this medicine

DO NOT USE: For those aged under 16 due to a possible association between salicylates and Reye's syndrome, a very rare but very serious disease. If you are allergic to salicylates including aspirin, or any of the ingredients. With other salicylates including aspirin.

STOP USE AND ASK YOUR DOCTOR IF: Symptoms are severe or persist for more than 2 days. Diarrhoea is accompanied by fever. You notice anything unusual or have any unexpected effects. You accidentally take too much product.

ASK A DOCTOR BEFORE USE IF YOU ARE TAKING MEDICINES FOR: Anticoagulation (thinning the blood). Diabetes. Gout.

NOT RECOMMENDED IF: Pregnant or breast-feeding - ask a health professional before use.

Read the instructions carefully before taking the product - if you have any questions ask your doctor or pharmacist.

NOTE: The product may cause a temporary and harmless darkening of the stool and/or tongue.

Warning: this product contains sorbic and salicylic acid which can cause dermatitis, amaranth which can cause allergic type reactions including asthma, and benzoic acid which is a mild irritant to skin, eyes, and gums.



Bismuth subsalicylate, Aluminium magnesium silicate, Methylcellulose, Methyl salicylate, Salicylic acid, Saccharin sodium, Sodium salicylate, Amaranth (E123), Sorbic Acid, Benzoic Acid (E210), Purified water.

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