Antacids may not be the answer.
There are many different causes for heartburn and indigestion, which include hiatal hernia, gastroesophogeal (GE) reflux, gastritis, ulcer disease, gallbladder disease, excessive acid production, low acid production, pancreatic insufficiency and food allergy. But I believe one of the most common causes of heartburn and indigestion is hypochlorhydria, which is decreased gastric acid secretion or, more simply put, not enough hydrochloric acid.
Approximately 50 percent of people over the age of 50 have low stomach acidity. The stressful lifestyles of most Americans account for much of this. Carrying too heavy a stress load is like running your car engine past the red line, or leaving your toaster stuck in the "on" position, or running a nuclear reactor past maximum permissible power. Sooner or later something will break, burn up or melt down.