omeprazole use and side effects
Common omeprazole side effects may include: 1  stomach pain, gas; 2  nausea, vomiting, diarrhea; or. 3  headache.
Prilosec (omeprazole) is a proton pump inhibitor (PPI) used for the treatment of conditions such as ulcers, gastroesophageal reflux disease (GERD), and Zollinger-Ellison syndrome, which are all caused by stomach acid. Prilosec is available in generic form. Side effects of Prilosec include: headache,