Gelusil Antacid and Anti-Gas Tablets provide additional relief from all of the nasty upset stomach symptoms you may experience when a prescription medication isn’t enough. In other words, if you take Nexium, Prevacid, Prilosec OTC or the like, but still experience heartburn, indigestion, bloating and gas in between doses, you’re not alone and Gelusil can help. In fact, nearly half of all people who take a PPI acid reducer need an additional rescue heartburn treatment like Gelusil. The Gelusil brand has been a trusted name for more than 70 years. It uses aluminum hydroxide and magnesium hydroxide to provide relief along with simethicone. Gelusil even helps relieve nighttime heartburn. It is completely safe to use with prescription heartburn medications, but please consult your doctor if you have any questions.