There's no tactful way for me to say this so Iet me just be honest. I have a sensitive stomach. Things coffee and rich foods tend to give me an upset stomach. But I love coffee and rich foods. Since I lack the self-discipline to keep myself from consuming these things I always have a couple Alka-Seltzer Antacid Pain Relief Medicine Effervescent Tablets on hand. What I like about Alka Seltzer is it works great for a variety of issues. Heartburn, upset stomach, gas, it helps all of them. And it doesn't gum up the works like other stomach medicines like Pepto Bismol and Immodium. Alka Seltzer comes in a variety of flavors but I choose regular unflavored. Don't get me wrong, I prefer the flavored version but they're more expensive and, since I use Alka Seltzer quite a bit, I've gotten used to the somewhat bitter unflavored version. If you don't care for the flavor I've found it helps to drink it in very cold water. Basically, Alka Seltzer works great.