Omeprazole is a medication that falls under the category of proton pump inhibitors (PPIs). It's primarily used to treat conditions related to excess stomach acid, such as gastroesophageal reflux disease (GERD), stomach ulcers, and Zollinger-Ellison syndrome. It works by reducing the amount of acid your stomach produces, providing relief from symptoms like heartburn and helping to heal acid-related damage in the esophagus and stomach lining.

Typically, omeprazole is taken orally, and it's available over-the-counter for short-term use or by prescription for more chronic conditions. As with any medication, it's important to use omeprazole as directed by a healthcare provider and to be aware of potential side effects, which can include headache, nausea, diarrhea, and, in rare cases, more serious effects like vitamin B12 deficiency or bone fractures with long-term use.

If you have any specific questions or concerns about using omeprazole, it's best to consult with a healthcare professional for personalized advice.