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Antacids are a class of drugs used to treat conditions caused by the acid that is produced by the stomach. The stomach naturally secretes an acid called hydrochloric acid that helps to break down proteins. This acid causes the contents of the stomach to be acidic in nature, with a pH level of 2 or 3. (pH levels are a measure of acidity in the stomach: the lower the number, the greater the acidity.) The stomach, duodenum, and esophagus are protected from acid by several protective mechanisms. When there is too much acid or protective mechanisms are inadequate, the lining of the stomach, duodenum or esophagus may become damaged by the acid, giving rise to various gastrointestinal symptoms such as abdominal pain, heartburn (due to gastroesophageal reflux disease or GERD), and other gastro-esophageal symptoms.
Antacids reduce acidity by neutralizing (counteracting) acid, reducing the acidity in the stomac...
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Inform patients that the most frequently occurring adverse reactions in US clinical trials for adults are headache, diarrhea, nausea, abdominal pain, vomiting, flatulence, dizziness, and arthralgia.
Patients should be instructed to inform their healthcare provider if they develop any unusual symptom, or if any known symptom persists or worsens. Patients should be instructed to inform their healthcare provider of any other medications they are currently taking, including over-thecounter medications, as well as allergies to any medications.
Last reviewed on RxList: 12/28/2011
This monograph has been modified to include the generic and brand name in many instances.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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