The average Pepto bismol cash price is about $12.99 for a supply of: Tablet Chewable 262 MG 30 pcs. Get our free Pepto bismol coupon and be eligible to receive a discount. You can reduce your Pepto bismol cost by up to 75% with our free Pepto bismol discount card. Bring it to a participating pharmacy near you to save on your prescription medication.Treating heartburn, upset stomach, indigestion, nausea, diarrhea, or symptoms associated with eating or drinking too much. It may be used to decrease the number of bowel movements and make the stool firmer. It may also be used to treat other conditions as determined by your doctor. Pepto-Bismol is a salicylate. The way that it works is not fully understood. It is thought to limit secretions in the digestive tract, reduce inflammation in the stomach and intestines, and inhibit the growth of certain bacteria and viruses that can cause intestinal tract diseases.