Antacids, such as Alka-Seltzer, Maalox, Mylanta, Pepto-Bismol, Rolaids, and Riopan, are usually the first drugs recommended to relieve heartburn and other mild GERD symptoms. Many brands on the market use different combinations of three basic salts--magnesium, calcium, and aluminum--with hydroxide or bicarbonate ions to neutralize the acid in your stomach. Antacids, however, have side effects. Magnesium salt can lead to diarrhea, and aluminum salts can cause constipation. Aluminum and magnesium salts are often combined in a single product to balance these effects.
Calcium carbonate antacids, such as Tums, Titralac, and Alka-2, can also be a supplemental source of calcium. They can cause constipation as well.
Foaming agents, such as Gaviscon, work by covering your stomach contents with foam to prevent reflux. These drugs may help those who have no damage to the esophagus.
H2 blockers, such as cimetidine (Tagamet HB), famotidine (Pepcid AC), nizatidine (Axid AR), and ranitidine (Zantac 75), impede acid production. They are available in prescription strength and over the counter. These drugs provide short-term relief, but over-the-counter H2 blockers should not be used for more than a few weeks at a time. They are effective for about half of those who have GERD symptoms. Many people benefit from taking H2 blockers at bedtime in combination with a proton pump inhibitor.
Proton pump inhibitors include omeprazole (Prilosec), lansoprazole (Prevacid), pantoprazole (Protonix), rabeprazole (Aciphex), and esomeprazole (Nexium), which are all available by prescription. Proton pump inhibitors are more effective than H2 blockers and can relieve symptoms in almost everyone who has GERD.
Another group of drugs, prokinetics, helps strengthen the sphincter and makes the stomach empty faster. This group includes bethanechol (Urecholine) and metoclopramide (Reglan). Metoclopramide also improves muscle action in the digestive tract, but these drugs have frequent side effects that limit their usefulness.
Because drugs work in different ways, combinations of drugs may help control symptoms. People who get heartburn after eating may take both antacids and H2 blockers. The antacids work first to neutralize the acid in the stomach, while the H2 blockers act on acid production. By the time the antacid stops working, the H2 blocker will have stopped acid production. Your doctor is the best source of information on how to use medications for GERD.
