Lansoprazole Zentiva Pharma Uk (Lansoprazole)

Lansoprazole is a proton pump inhibitor that reduces gastric acid production in several gastrointestinal disorders.

• Gastro‑esophageal reflux disease (GERD): alleviates heartburn and esophageal irritation by lowering acid exposure.
• Duodenal ulcer: promotes healing of ulcerated mucosa through acid suppression.
• Helicobacter pylori eradication: used as part of combination therapy to increase eradication rates.
• Zollinger‑Ellison syndrome: controls excessive gastric acid secretion in this rare endocrine disorder.

• Lansoprazole irreversibly binds to the H+/K+ ATPase enzyme (the gastric proton pump) on the parietal cell membrane, blocking the final step of acid secretion. This inhibition markedly reduces both basal and stimulated gastric acid output, raising gastric pH and facilitating ulcer healing and symptom relief. The effect persists until new enzyme molecules are synthesized, providing prolonged acid suppression after each dose.

Lansoprazole may cause a range of adverse reactions, from mild to serious.

Common Side Effects

• Headache: mild headache reported in many patients.
• Diarrhea: loose stools occurring during treatment.
• Nausea: feeling of queasiness or upset stomach.
• Abdominal pain: discomfort or cramps in the abdomen.
• Flatulence: increased gas production.

Serious or Rare Side Effects

• Severe allergic reaction: rash, itching, swelling, or difficulty breathing.
• Clostridioides difficile infection: severe colitis presenting with watery diarrhea.
• Low magnesium levels: hypomagnesemia causing muscle cramps or irregular heartbeat.
• Bone fractures: increased risk of hip, wrist or spine fractures with long‑term use.
• Liver dysfunction: elevated liver enzymes or jaundice.

When prescribing Lansoprazole, clinicians should consider several safety measures.

• Assess renal function: adjust use in patients with severe renal impairment.
• Monitor magnesium: prolonged therapy may lead to hypomagnesemia.
• Evaluate bone health: long‑term use may increase fracture risk.
• Review concomitant medications: potential interactions with drugs requiring gastric pH.
• Use cautiously in hepatic disease: dose may need adjustment in severe liver impairment.
• Store at ambient temperature: keep below 25°C, retain original packaging, protect from moisture.

Lansoprazole can affect the pharmacokinetics of several medicines, requiring attention to possible interactions.

Major Interactions (Avoid)

• Ketoconazole: reduced absorption due to increased gastric pH.
• Atazanavir: markedly decreased exposure, compromising antiviral efficacy.
• Clopidogrel: diminished activation leading to reduced antiplatelet effect.

Moderate Interactions (Monitor Closely)

• Warfarin: possible increase in INR, monitor coagulation.
• Digoxin: increased serum levels, observe for toxicity.
• Methotrexate: higher concentrations may occur, especially with high-dose regimens.