Lansoprazole
Prevacid (lansoprazole) is a proton pump inhibitor (PPI) used to treat conditions caused by excess stomach acid, including gastroesophageal reflux disease (GERD), peptic ulcers, and erosive esophagitis. It is also used in combination with antibiotics to treat H. pylori infections and to manage Zollinger-Ellison syndrome. Prevacid is available by prescription and over-the-counter in various forms.
Prevacid reduces stomach acid production to treat acid-related conditions like heartburn, ulcers, and GERD.
Key facts at a glance
- RxNorm
- 83156
- Generic
- Prevacid
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Treatment of GERD, gastric and duodenal ulcers, erosive esophagitis, Zollinger-Ellison syndrome, and H. pylori infection (as part of combination therapy). Also used for heartburn and acid indigestion relief.
Prevacid works by irreversibly blocking the proton pump (hydrogen-potassium ATPase) in stomach parietal cells, which significantly reduces the production of stomach acid.
Take before meals, typically 30-60 minutes before eating. Do not crush or chew capsules. Long-term use may increase risk of bone fractures, low magnesium levels, and Clostridioides difficile infection. May interact with certain medications including methotrexate, rilpivirine, and some antiplatelet drugs. Consult your doctor before use if pregnant or breastfeeding.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 9, 2026. · Read our editorial policy