Prilosec is both an over-the-counter and a prescription medication. The over-the-counter form is used to treat heartburn. The prescription form is used to treat gastroesophageal reflux disease (GERD), certain types of ulcers, Zollinger-Ellison Syndrome, erosive esophagitis (EE), and infections caused by the bacteria H. pylori. This medication page refers to the prescription form of Prilosec.
Prilosec belongs to a group of drugs called proton pump inhibitors, which work by reducing the amount of acid made in the stomach.
This medication comes in delayed-release capsule form and in packets to be mixed with water to form a liquid (suspension). It is taken once or twice daily, one hour before a meal.
Common side effects of Prilosec include constipation, gas, nausea, vomiting, and headache.
Prilosec can cause dizziness, drowsiness, and blurred vision. Do not drive or operate heavy machinery until you know how Prilosec affects you.