From the Manufacturer
How does Gas-X relieve gas?
Gas-X works with your body to help relieve gas. Gas-X uses simethicone – the #1 doctor recommended ingredient for fast gas relief (among OTC brands)* – to break up gas bubbles in your stomach and intestines. Once this trapped gas is broken down, your body can then deal with the gas naturally. *QuintilesIMS: 52 weeks ending 03/2017
Can I take Gas-X?
Yes. Simethicone, the active ingredient in Gas-X, works fast in your GI tract without being absorbed into the bloodstream. It’s an anti-foaming agent that is taken orally to help reduce the buildup of intestinal and stomach gases that cause bloating and discomfort. Still, please use Gas-X products only as directed.
How fast will I feel better?
Everyone’s biochemistry is a little different, so speed of gas relief will vary by person. But in general, Gas-X works in minutes. If you have prolonged discomfort though, it’s best to consult with your doctor, just in case.