prilosec what is it used for
A: Prilosec (omeprazole) belongs to a class of drugs called proton pump inhibitors (PPIs). PPIs decrease or block the production of stomach acid. Prilosec is used to treat the symptoms of gastroesophageal reflux disease (GERD), to promote healing of erosive esophagitis, and to treat or prevent ulcers. Common side effects of Prilosec include gas, stomach pain, nausea, vomiting, diarrhea, and headache.