If you’re already gassy, it’s probably too late to do much about it. There’s no good evidence that Gas-X and other products that contain the active ingredient simethicone help much. But you can often head off the problem by taking a digestive aid such as Beano, which contains an enzyme that breaks down hard-to-digest sugars in beans, broccoli, and other troublemakers.

 

 

From 

Best over-the-counter (OTC) drugs for common ailments

What to buy to make you feel better