Even some antacids - such as Alka-Seltzer -- contain aspirin, which can be a special risk to people with ulcers. "It's very common to see a person with an ulcer using Alka-Seltzer," says Cryer.

Just be sure that the Alka-Seltzer tabs you plan to use don't contain aspirin. If you're scratching your head wondering how the heck the Alka-Seltzer tabs you have sitting with your Tylenol and ...