Maalox Plus 355 Ml Suspension Antacid ( Aluminium Hydroxide + Magnesium Hydroxide ) Maalox Plus on ingestion, it reacts with gastric acid to rapidly form a raft of alginic acid gel having a near-neutral pH which floats on the stomach contents effectively impeding gastroesophageal reflux for up to 4 hours, and protecting the esophagus from acid, pepsin and bile. And it contain Simethicone which is used to relieve painful pressure caused by excess gas in the stomach and intestines. Indications: Relief of heartburn. Acid indigestion. Gas relief. Points of interest: If symptoms do not improve after seven days, the clinical situation should be reviewed.