Pantoprazole Sun Pharmaceutical Industries Europe (Pantoprazole)

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

• Gastro‑oesophageal reflux disease (GERD): provides symptomatic relief and promotes healing of the oesophageal lining.
• Erosive oesophagitis: heals erosions and prevents further damage.
• Peptic ulcer disease (duodenal and gastric ulcers): supports ulcer healing and reduces recurrence risk.
• Zollinger‑Ellison syndrome: controls excessive gastric acid secretion associated with the disorder.

• Pantoprazole selectively inhibits the H+/K+‑ATPase enzyme (the gastric proton pump) located on the secretory surface of parietal cells. By binding covalently to the pump in its active state, it blocks the final step of acid production, leading to a sustained reduction in gastric acidity and allowing mucosal healing.

Pantoprazole is generally well tolerated, but adverse reactions can occur.

Common Side Effects

• Headache: mild to moderate intensity.
• Diarrhoea: usually self‑limiting.
• Nausea: occasional and transient.
• Abdominal pain: mild discomfort.
• Flatulence: excess gas formation.
• Constipation: infrequent bowel changes.

Serious or Rare Side Effects

• Clostridioides difficile infection: severe colitis risk.
• Acute interstitial nephritis: kidney inflammation.
• Severe hypersensitivity reactions: including rash, angio‑edema or anaphylaxis.
• Osteoporotic fractures: increased risk with long‑term use.
• Vitamin B12 deficiency: may develop with prolonged therapy.

When prescribing Pantoprazole, consider the following precautions:

• Assess renal function: dose adjustment may be required in severe impairment.
• Evaluate hepatic function: use with caution in moderate to severe liver disease.
• Review concomitant medications: potential for reduced absorption of drugs that need an acidic environment.
• Limit duration of therapy: avoid unnecessary long‑term use to reduce fracture risk.
• Monitor for signs of infection: especially Clostridioides difficile.
• Store below 25°C: keep in the original container, protect from moisture and direct sunlight.

Pantoprazole may interact with several medicines, altering their effectiveness or safety.

Major Interactions (Avoid)

• Antifungal agents (ketoconazole, itraconazole): reduced absorption due to higher gastric pH.
• HIV protease inhibitors (atazanavir, nelfinavir): decreased plasma concentrations.
• Clopidogrel: diminished antiplatelet activity.

Moderate Interactions (Monitor Closely)

• Warfarin: potential increase in INR; monitor coagulation.
• Methotrexate (high dose): reduced renal clearance; check serum levels.
• Digoxin: possible increase in serum concentration.
• Oral contraceptives: may have reduced efficacy; advise backup contraception.