Antidiarrheals are used to treat diarrhea. These medications work by slowing down the movement of your intestines, which helps to reduce the frequency and urgency of bowel movements. Antidiarrheals come in different forms, including oral tablets, liquids, and chewable tablets. Examples include loperamide (Imodium A-D), bismuth subsalicylate (Bismatrol), and crofelemer (Mytesi). Your prescriber can help you choose the form that best fits your needs.