Novogast (Omeprazole)

Omeprazole is a proton pump inhibitor that acts on the gastric acid secretion pathway. It is indicated for several acid‑related disorders:

• Gastro‑oesophageal reflux disease (GERD): Improves symptom relief and promotes healing of the esophageal lining.
• Peptic ulcer disease: Facilitates ulcer healing and reduces recurrence risk.
• Zollinger‑Ellison syndrome: Controls excess gastric acid production.
• Erosive esophagitis: Aids mucosal healing and symptom control.
• NSAID‑induced ulcer prophylaxis: Lowers risk of ulcer development in at‑risk patients.

• Omeprazole selectively inhibits the H+/K+‑ATPase enzyme (the gastric proton pump) located on the secretory surface of gastric parietal cells. By binding covalently to the pump’s cysteine residues, it blocks the final step of acid secretion, leading to a prolonged reduction in gastric acidity and an increase in gastric pH.

Adverse reactions may range from mild to severe and should be monitored during therapy.

Common Side Effects

• Headache: mild, transient headache.
• Diarrhea: loose stools, often self‑limiting.
• Abdominal pain: mild discomfort in the stomach area.
• Nausea: occasional feeling of queasiness.
• Flatulence: increased intestinal gas.
• Constipation: reduced bowel movements.

Serious or Rare Side Effects

• Clostridioides difficile infection: severe colitis presenting with watery diarrhea.
• Acute interstitial nephritis: kidney inflammation with possible renal impairment.
• Hypomagnesemia: low serum magnesium causing muscle cramps or cardiac arrhythmia.
• Stevens‑Johnson syndrome: rare skin and mucous membrane reaction.
• Hepatic injury: elevated liver enzymes or hepatitis.
• Fracture risk: potential decrease in bone mineral density with long‑term use.

Before initiating therapy, consider the following safety measures:

• Assess renal function: adjust use in patients with severe renal impairment.
• Review hepatic status: use cautiously in liver disease.
• Evaluate infection risk: monitor for Clostridioides difficile if prolonged therapy is planned.
• Pregnancy and lactation: weigh benefits against potential risks; consult obstetric guidance.
• Drug‑interaction review: check concomitant medications for possible interactions.
• Store at ambient temperature: keep below 25°C, retain original packaging, protect from moisture.

Omeprazole may interact with several medicines; careful management is advised.

Major Interactions (Avoid)

• Antifungal azoles (e.g., ketoconazole): reduced absorption of omeprazole.
• Clopidogrel: decreased antiplatelet effect, increasing cardiovascular risk.
• Atorvastatin: increased plasma concentration, raising risk of myopathy.

Moderate Interaction ​​  

• Warfarin: may alter  

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