Proton pump inhibitor (PPI)Generic available
Omeprazole
Sold as Prilosec
Omeprazole reduces stomach acid. Used for heartburn, GERD, and ulcers. Available OTC and Rx.
Compare prices →~$9.00 / mo (generic, NADAC)
What it treats
GERD, peptic ulcer disease, H. pylori eradication (with antibiotics), erosive esophagitis.
Typical dosing
OTC: 20 mg once daily for up to 14 days. Rx doses vary by indication, typically 20–40 mg/day.
Side effects
Common: headache, stomach pain, gas, diarrhea. Long-term use: low magnesium, B12 deficiency, slightly increased fracture risk.
Interactions to know
Reduces effectiveness of clopidogrel (Plavix). Affects absorption of certain HIV and antifungal meds.
Pregnancy & breastfeeding
Generally considered low-risk in pregnancy.
Educational only. Not medical advice. Always confirm with your prescriber or pharmacist.