I just experience the most intense stomach peoblem, where I thought my stomach was going to explode. Finally after 3 or 4 hours I finally vomited it out. This was my first time using Perpcid AC. Now I have the most painful heartburn. I tried Pepcid before using the Pepcid, but all I did was end up with a swollen stomach and swollen legs and feet after only three days. Oh, and of course diarriea, which knocks me for a loop. I m 78 years old and two years ago ended up in hospital with an ulcer, but up until last week was doing fine.