If you experience severe diarrhea or it persists for several days, stop taking Gas-X and consult with your doctor. The above information is intended to supplement, not substitute for, the expertise and judgment of your health care professional. You should consult your health care professional before taking any drug, changing your diet, or commencing or discontinuing any course of treatment. Simethicone relievesabdominal pain due to excessive gas in the digestive tract. Gas-x Extra Strength Uses, Dosage, Side Effects and more If your doctor has prescribed this medication, take it as directed. If you have any questions, ask your doctor or pharmacist. Always follow directions on the medicine label about giving Gas-X Extra Strength to a child. Other formulations Selected from NATIONAL DRUG DATA FILE (NDDF) data included with permission and copyrighted by gas-x extra strength side effects First Databank, Inc., 2019. This copyrighted material has been downloaded from a licensed data provider. Selected from data included with permission and copyrighted by First Databank, Inc. This medicine is a pink, round, scored, cherry creme, chewable tablet imprinted with ”GAS-X ES”. If you are using the chewable tablets, chew each tablet well and swallow. Since Gas-X Extra Strength is used when needed, you may not be on a dosing schedule. You may report side effects to FDA at FDA-1088 or at /medwatch. In the case of an overdose stop the drug and initiate...