The active ingredient for Gas-X and what makes Gas-X safe for pregnancy is Simethicone. Simethicone is an oral anti-foaming agent that is used to reduce gas, bloating, and the discomfort or pain that can be caused by having excessive gas. Simethicone is typically given in either a capsule or tablet, chewable tablet, or dissolving membranes.
Chemical action and pharmaceutical effects
Simethicone is an anti-foaming agent that decreases the surface tension of gas bubbles, causing them to combine into larger bubbles in the stomach that can be passed more easily. Simethicone does not reduce or prevent the formation of gas in the digestive tract, rather, it increases the rate at which it exits the body. However, simethicone can relieve pain caused by gas in the intestines by decreasing foaming which then allows for passing of flatulence. Simethicone is not absorbed by the body into the bloodstream, and is therefore considered relatively safe. National Institutes of Health (NIH) reports there are usually no side effects when simethicone is taken as directed. Although simethicone has also been promoted as a treatment for colic, randomised controlled trials have not demonstrated efficacy for such use.
Simethicone solutions of differing concentration also have industrial applications for reducing foaming in certain chemical processes.
Since Gas-X is an over the counter product, the harm of using during pregnancy is typically reduced. Many physicians actually recommend Gas-X if you are suffering from excessive gas and bloating and you are looking to relieve the discomfort. Now it is always good practice to check with your physician if you choose to use Gas-X while pregnant. The doctor will tell you to take less then the recommended dosage of Gas-X especially if you are in the first trimester of pregnancy.
Overall, doctors believe Gas-X Safe To Use During Pregnancy.