Imodium 2mg Instant Melt Tablet is classified as an antidiarrheal medication that contains loperamide as the active ingredient. Loperamide works by slowing down the movement of the intestines, which helps to decrease the number of bowel movements and make the stool less watery. This medication is commonly used to treat acute or chronic diarrhea in adults and children over 6 years of age. It is important to follow the prescribed dosage and not exceed the recommended amount to avoid potential side effects.