To treat gastroesophageal reflux disease (GERD): Adults—20 milligrams (mg) once a day before a meal. Your doctor may want you to take omeprazole for more than 8 weeks for certain conditions. Children 1 year of age and older—Dose is based on body weight and must be determined by your doctor. The dose is usually 5 to 20 mg once a day before a meal.

Prescription omeprazole is used alone or with other medications to treat the symptoms of gastroesophageal reflux disease (GERD), a condition in which backward flow of acid from the stomach causes heartburn and possible injury of the esophagus (the tube between the throat and stomach) in adults and children 1 year of age and older.

Omeprazole Delayed Release Tablets 20 mg stop acid production at the source - the acid pump that produces stomach acid. Omeprazole Delayed Release Tablets 20 mg are to be used once a day (every 24 hours), every day for 14 days.