Pepto-Bismol is an active ingredient it bismuth subsalicylate, which is also responsible for its distinctive pink color. The primary symptoms aided by Pepto-Bismol are nausea, heartburn, indigestion, upset stomach, diarrhoea, and other temporary discomforts of the stomach and gastrointestinal tract. Pepto-Bismol is made in chewable tablets and its original formula which is a thick liquid. This original formula is a medium pink color. Pepto Bismol is the only leading medicine that relieves five stomach problems. For more than 100 years, consumers have found relief for five stomach problems with soothing pink, taste liquid formula Pepto-Bismol. Whether you're suffering from heartburn, indigestion, upset stomach, nausea, or diarrhoea, Pepto-Bismol can provide the soothing relief you need. Pepto Bismol contains the active ingredient Bismuth. Bismuth has several actions in the gut. It forms a coating over ulcers in the stomach and gut protecting them from stomach acid and allowing them to heal. It also kills bacteria, including those which are now believed to aggravate ulcers.