Lansoprazole Lupin Healthcare (Uk) (Lansoprazole)

Lansoprazole acts on the gastric proton pump to control acid‑related disorders.

• Gastro‑oesophageal reflux disease (GERD): provides symptomatic relief and promotes healing of esophageal irritation.
• Peptic ulcer disease: promotes ulcer healing by reducing gastric acidity.
• Erosive esophagitis: facilitates mucosal recovery through sustained acid suppression.
• Helicobacter pylori eradication regimens: enhances the effectiveness of antibiotic combinations by creating a less acidic gastric environment.

• Lansoprazole selectively and irreversibly inhibits the H+/K+ ATPase enzyme (the gastric proton pump) located on the secretory surface of parietal cells. By blocking this final step of acid secretion, it markedly lowers both basal and stimulated gastric acid output, leading to an increased gastric pH and reduced acidity in the stomach.

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

Common Side Effects

• Headache: mild to moderate intensity.
• Diarrhea: loose stools, often transient.
• Nausea: feeling of unease or upset stomach.
• Abdominal pain: discomfort in the upper abdomen.
• Flatulence: increased gas production.
• Constipation: reduced bowel movements.

Serious or Rare Side Effects

• Severe allergic reaction: rash, swelling, or difficulty breathing.
• Clostridioides difficile infection: persistent diarrhea with possible fever.
• Low magnesium levels (hypomagnesemia): muscle cramps or irregular heartbeat.
• Bone fractures: increased risk with long‑term use.
• Liver enzyme elevation: abnormal liver function tests.
• Acute interstitial nephritis: kidney inflammation presenting with reduced urine output.

Before using Lansoprazole, consider the following safety measures.

• Hypersensitivity: avoid if known allergy to lansoprazole or other PPIs.
• Long‑term therapy: monitor for vitamin B12 deficiency, bone density loss, and renal function.
• Liver impairment: use with caution; dose adjustment may be required.
• Pregnancy and lactation: discuss risks with a healthcare professional before use.
• Drug absorption: be aware that reduced stomach acidity may affect absorption of drugs such as ketoconazole or iron salts.
• Storage: Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Lansoprazole can affect the pharmacokinetics of several medicines.

Major Interactions (Avoid)

• Atazanavir: markedly reduced antiviral absorption; avoid co‑administration.
• Ketoconazole: decreased antifungal efficacy due to reduced acidity.
• Clopidogrel: diminished antiplatelet activation; consider alternative therapy.
• Warfarin: potential increase in anticoagulant effect; monitor INR closely.
• Methotrexate (high dose): increased toxicity risk; monitor serum levels.

Moderate Interactions (Monitor Closely)

• Digoxin: modest increase in serum concentration; assess clinical response.
• Iron supplements: reduced iron absorption; separate dosing by at least 2 hours.
• Calcium carbonate: may decrease calcium absorption; monitor bone health.
• Diazepam: slight increase in plasma levels; watch for sedation.
• Mycophenolate mofetil: possible reduction in immunosuppressive effect; monitor therapeutic levels.