Lakeside Animal Clinic advises clients to treat diarrhea in dogs with Kaopectate or Pepto-Bismol. The recommended dosage is 1 teaspoon per every 5 pounds of the dog's weight every two hours. If the diarrhea persists after three or four doses, veterinary assistance is advised.
petMD explains that Kaopectate is a liquid anti-diarrhea medication for humans. Available over the counter, it contains bismuth subsalicylate that has antacid, anti-inflammatory, mild-antibiotic and protective properties. It is sometimes used to treat canine diarrhea, but it is not safe for use with cats.
Diet and stress are the most common causes of diarrhea in dogs, according to Dogster, and stool usually returns to normal within a few days with no treatment. Feeding a dog chicken and rice can help resolve the diarrhea and any stomach upset without the need to resort to medications.