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, Standard poodle owner. Tums is a brand of antacid that is used to treat symptoms of heartburn, acid reflux and ulcers in humans. However, it is safe to give to dogs if they are experiencing symptoms of an upset stomach. Antacids work by increasing the pH of the digestive tract to a more basic level.
8 Comments. 1  I gave my dog some Pepto for her upset stomach, 2 and a half to be specific. 2  Can I give my dog Pepto Max Strength for diarrhea? 3  Itâs more important to watch your dog to see what theyâve vomited and how often. 4  I have given my dog Pepto for runny and bloody stool. 5  Yes, you can give your dog Pepto Bismol for upset stomach.