Lansoprazol Tecnigen (Lansoprazole)

Lansoprazole acts on the gastric proton pump to lower acid secretion, benefiting several acid‑related disorders.

• Gastro‑esophageal reflux disease (GERD): alleviates heartburn and esophageal irritation by reducing acid exposure.
• Peptic ulcer disease: promotes ulcer healing and prevents recurrence through sustained acid suppression.
• NSAID‑induced ulcer prophylaxis: protects the gastric lining in patients receiving non‑steroidal anti‑inflammatory drugs.
• Helicobacter pylori eradication (in combination therapy): enhances the effectiveness of antibiotic regimens by creating a less acidic environment.

• Lansoprazole irreversibly binds to the H+/K+ ATPase enzyme (gastric proton pump) located on the secretory surface of parietal cells. By inhibiting this final step of acid production, it markedly reduces both basal and stimulated gastric acid secretion, leading to increased gastric pH and allowing mucosal healing in acid‑related gastrointestinal conditions.

Lansoprazole is generally well tolerated, but some patients may experience adverse reactions.

Common Side Effects

• Headache: mild to moderate pain often resolves without intervention.
• Diarrhea: loose stools that may be transient.
• Nausea: feeling of unease or urge to vomit.
• Abdominal pain: discomfort in the stomach area.
• Flatulence: excess gas causing bloating.
• Constipation: difficulty passing stools.

Serious or Rare Side Effects

• Severe allergic reactions (anaphylaxis): swelling, rash, difficulty breathing.
• Clostridium difficile infection: severe diarrhea with abdominal cramping.
• Stevens‑Johnson syndrome: painful skin lesions and mucosal involvement.
• Elevated liver enzymes: signs of hepatic stress.
• Hypomagnesemia: low magnesium levels causing muscle cramps or arrhythmias.
• Interstitial nephritis: kidney inflammation presenting with fever and rash.

Before initiating therapy, consider the following safety measures.

• Renal function assessment: adjust use in patients with impaired kidney function.
• Magnesium monitoring: check serum levels during prolonged treatment.
• Discontinuation strategy: avoid abrupt cessation after long‑term use to prevent rebound acid hypersecretion.
• Hepatic impairment: use with caution in patients with liver disease.
• Drug interaction review: evaluate concomitant medications that may affect acid levels.
• Store at ambient temperature: keep below 25 °C, retain in original packaging, protect from moisture and direct sunlight.

Lansoprazole may alter the absorption or metabolism of several drugs.

Major Interactions (Avoid)

• Ketoconazole: reduced antifungal efficacy due to decreased gastric acidity.
• Atazanavir: impaired antiviral absorption leading to subtherapeutic levels.
• Clopidogrel: diminished antiplatelet effect increasing cardiovascular risk.
• Methotrexate (high dose): increased toxicity from reduced clearance.

Moderate Interactions (Monitor Closely)

• Warfarin: potential alteration of anticoagulant effect; monitor INR.
• Digoxin: possible increase in serum concentration; assess for toxicity.
• Phenytoin: may reduce phenytoin levels; adjust dosage if needed.