The common side effects of Di-Gel antacids include nausea, vomiting, stomach cramps, diarrhea and taste problems, according to WebMD. Severe and rare side effects include kidney stones, alkalosis, increased amounts of calcium and magnesium along with reduced amounts of phosphate, and imbalance in body salts, such as sodium and potassium.
Di-Gel is a combination of compounds that includes aluminum hydroxide, magnesium hydroxide and simethicone, explains Drugs.com. The combination treats acid indigestion, upset stomach, heartburn and bloating. Because Di-Gel may interfere with the body's absorption of other medicines, it is best to avoid ingesting other medications within two hours of taking Di-Gel. Patients with kidney diseases or on a low-magnesium diet as well as pregnant and breastfeeding mothers should consult a doctor or a pharmacist before taking Di-Gel.