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.
Although Pepto-Bismol was originally created for alternate use, today's formula relieves travelers' diarrhea, diarrhea and upset stomach due to overindulgence in food and drink including: heartburn, indigestion, nausea, gas, belching and fullness.