Mesopral (Esomeprazole Magnesium Dihydrate)

Mesopral, a proton pump inhibitor, is employed to manage conditions caused by excess gastric acid.

• Gastro‑esophageal reflux disease (GERD): reduces acid exposure, relieving heartburn and regurgitation.
• Erosive esophagitis: promotes healing of inflamed esophageal tissue.
• Duodenal ulcer: supports ulcer healing by lowering gastric acidity.
• Helicobacter pylori eradication (in combination therapy): enhances the effectiveness of antibiotic regimens.
• Zollinger‑Ellison syndrome: controls hyper‑secretion of gastric acid associated with gastrin‑producing tumors.

• Esomeprazole magnesium dihydrate selectively and irreversibly inhibits the H+/K+ ATPase (gastric proton pump) located on the secretory surface of gastric parietal cells. By blocking this final step of acid production, it markedly reduces both basal and stimulated gastric acid secretion, leading to an increased gastric pH and facilitating mucosal healing.

Adverse reactions may occur with any medication and should be monitored.

Common Side Effects

• Headache: mild to moderate pain often transient.
• Diarrhea: loose stools that may resolve with continued therapy.
• Nausea: feeling of stomach upset, sometimes accompanied by vomiting.
• Abdominal pain: discomfort or cramping in the stomach area.
• Flatulence: increased intestinal gas.

Serious or Rare Side Effects

• Severe allergic reaction: rash, swelling, or difficulty breathing.
• Clostridioides difficile infection: persistent watery diarrhea and abdominal pain.
• Liver enzyme elevation: signs of hepatic dysfunction.
• Low magnesium levels: muscle weakness, tremors, or irregular heartbeat.
• Stevens‑Johnson syndrome: severe skin blistering and mucosal involvement.
• Interstitial nephritis: kidney inflammation presenting with reduced urine output.

Before initiating therapy, consider the following safety measures.

• Assess renal function: adjust use in patients with severe kidney impairment.
• Evaluate hepatic status: use cautiously in moderate to severe liver disease.
• Check for hypersensitivity: discontinue if allergic reactions occur.
• Monitor magnesium: long‑term treatment may deplete serum magnesium.
• Pregnancy and lactation: consult a prescriber; benefits must outweigh potential risks.
• Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Esomeprazole may affect the pharmacokinetics of several co‑administered drugs.

Major Interactions (Avoid)

• Ketoconazole, itraconazole, HIV protease inhibitors (e.g., ritonavir): reduced antifungal/antiviral efficacy.
• Clopidogrel: diminished antiplatelet activity, increasing cardiovascular risk.

Moderate Interactions (Monitor Closely)

• Warfarin: potential increase in INR, requiring closer coagulation monitoring.
• Digoxin: elevated serum levels may occur, necessitating dose adjustment.
• Methotrexate: increased toxicity risk, especially at high doses.
• Atorvastatin: higher statin exposure may raise risk of myopathy.