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OmeprazoleOver the counter
Pronounced oh-MEP-rah-zole
Brand names: Prilosec
Type: Proton pump inhibitor (acid reducer) · All Digestive (GI) Medicines
What Omeprazole is used for
- Acid reflux and heartburn (GERD)
- Stomach and intestinal ulcers
- Protecting the stomach in people taking NSAIDs
- Part of stomach ulcer (H. pylori) treatment
◆ Kidney note
Has been linked in rare cases to a kidney inflammation (acute interstitial nephritis) that can appear at any time during treatment — unexplained kidney test changes on it should be reviewed.
Common side effects
- Headache
- Diarrhea
- Stomach pain
- Nausea
- Gas
Important cautions
- Long-term use is linked with low magnesium, vitamin B12 deficiency, bone thinning, and higher rates of some gut infections — the need is reviewed periodically
- Can reduce how well the antiplatelet medicine clopidogrel works — the care team weighs this after stent placement
How it comes
Capsules, tablets, liquid, powder packets. This guide lists forms only — it never lists strengths or doses.
Toxicity lists: Omeprazole also appears on Medicines That Can Harm the Kidneys.
Related medicines — Digestive (GI) Medicines
Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.