Antidiarrheals are medications used to treat diarrhea, a condition characterized by frequent, loose, or watery bowel movements. They work by slowing down the movement in the gut, allowing for more water to be absorbed from the stool, which helps to reduce the frequency of bowel movements. Common types of antidiarrheals include loperamide and bismuth subsalicylate. These medications can be helpful for managing symptoms caused by various factors, such as viral infections, food intolerances, or stress. However, they are not suitable for all types of diarrhea, especially when caused by bacterial infections or toxins, as they may worsen the condition. Always consult a healthcare professional before use.