Pepto-Bismol is an over-the-counter medication commonly used to relieve symptoms of upset stomach, nausea, heartburn, and diarrhea. Its active ingredient, bismuth subsalicylate, works by coating the stomach lining and reducing inflammation. This helps to soothe discomfort and protect the stomach from irritants. The medication is available in liquid form and chewable tablets, making it easy to take. Pepto-Bismol is often recognized by its distinctive pink color and is a popular choice for treating digestive issues. However, it is important to follow the dosage instructions and consult a healthcare professional if symptoms persist.