In addition to antacids, there are several types of nonprescription acid reducers on the market. Examples include H2 blockers (such as nizatidine (Axid), famotidine (Pepcid, Pepcid AC), cimetidine (Tagamet, Tagamet HB) and ranitidine (Zantac), and proton pump inhibitors (such as omeprazole (Prilosec), lansopraole (Prevacid), pantoprazole (Nolpaza), and esomeprasole (Nexium).
Sodium Bicarbonate NaHCO3 low Fluid retention, Alka-Seltzer®
Alkalosis Neut
Magnesium Hydroxide Mg(OH)2 high Diarrhea, Milk of Magnesia
Magnesium toxicity
Aluminum Hydroxide Al(OH)3 modest Constipation, Amphojel
Drug or phosphate binding (inhibits absorption)
Aluminum Phosphate Al(PO)4 modest Constipation, Phospalulgel
Drug or phosphate binding (inhibits absorption)
Calcium Carbonate CaCO3 very high Acid rebound Tums™, Titralac™
Belching