Omeprazole Mylan (Omeprazole Sodium)

Omeprazole Mylan is a proton‑pump inhibitor that acts on gastric acid secretion pathways.

• Gastro‑oesophageal reflux disease: provides relief of heartburn and promotes healing of erosive esophagitis.
• Peptic ulcer disease: supports ulcer healing and reduces risk of recurrence.
• Zollinger‑Ellison syndrome: controls excessive gastric acid secretion associated with gastrin‑producing tumors.
• Helicobacter pylori eradication regimens: used as part of combination therapy to improve ulcer healing rates.
• NSAID‑associated gastric protection: lowers the risk of ulcer formation in patients requiring long‑term NSAID therapy.

• Omeprazole sodium is a pro‑drug that is absorbed into the systemic circulation and accumulates in the acidic environment of the gastric parietal cell canaliculi. There, it is converted to its active sulfonamide form, which irreversibly binds to the H+/K+‑ATPase enzyme (the gastric proton pump), thereby inhibiting the final step of acid secretion and markedly reducing gastric acidity.

Omeprazole Mylan may cause a range of adverse reactions, most of which are mild and transient.

Common Side Effects

• Headache
• Diarrhea
• Nausea
• Abdominal pain
• Flatulence
• Constipation

Serious or Rare Side Effects

• Clostridioides difficile‑associated colitis
• Acute interstitial nephritis
• Severe allergic reactions (e.g., Stevens‑Johnson syndrome)
• Low magnesium (hypomagnesemia) with long‑term use
• Fracture risk with prolonged high‑dose therapy
• Vitamin B12 deficiency with chronic use

When using Omeprazole Mylan, consider the following precautions:

• Assess risk of infection : Patients with active infection should use caution.
• Monitor renal function : Renal impairment may require dose adjustment.
• Evaluate bone health : Long‑term use may affect calcium absorption.
• Review drug interactions : Check for potential interactions with medications metabolized by CYP enzymes.
• Store at below 25°C : keep in the original pack and protect from moisture.

Omeprazole Mylan can interact with several medicines, requiring careful management.

Major Interactions (Avoid)

• Clopidogrel : Reduced antiplatelet effectiveness.
• Atazanavir : Decreased absorption and efficacy.
• Ketoconazole : Impaired absorption due to higher pH.

Moderate Interactions (Monitor Closely):

• Warfarin : Potential increase in INR values.
• Phenytoin : Possible reduced plasma levels.
• Digoxin : May increase serum concentrations.