Lansoprazol Alternova (Lansoprazole)

Lansoprazol Alternova is a proton pump inhibitor used to treat disorders caused by excess gastric acid.

• Gastro‑esophageal reflux disease (GERD): relieves heartburn and prevents esophageal damage.
• Peptic ulcer disease: promotes healing of gastric and duodenal ulcers.
• Helicobacter pylori eradication: used in combination therapy to increase eradication rates.
• Erosive esophagitis: heals inflamed esophageal lining caused by acid exposure.
• Zollinger‑Ellison syndrome: controls hyper‑secretion of gastric acid in this rare endocrine disorder.

• 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 production, it markedly reduces basal and stimulated gastric acid secretion, leading to an increase in gastric pH and allowing ulcer healing and symptom relief in acid‑related conditions.

Adverse reactions may occur with lansoprazole therapy.

Common Side Effects

• Headache: mild to moderate pain in the head region.
• Diarrhea: loose, watery stools occurring intermittently.
• Nausea: sensation of unease and urge to vomit.
• Abdominal pain: discomfort or cramping in the stomach area.
• Flatulence: excess gas causing bloating.
• Constipation: infrequent or difficult bowel movements.

Serious or Rare Side Effects

• Clostridioides difficile infection: severe colitis presenting with watery diarrhea.
• Severe allergic reactions: rash, swelling, or anaphylaxis requiring emergency care.
• Stevens‑Johnson syndrome: rare skin blistering and mucosal involvement.
• Elevated liver enzymes: indication of hepatic stress.
• Hypomagnesemia: low magnesium levels causing muscle cramps or arrhythmias.
• Interstitial nephritis: kidney inflammation presenting with reduced urine output.

Before initiating therapy, consider the following precautions.

• Assess renal function: adjust use in patients with severe kidney impairment.
• Monitor for infections: prolonged acid suppression may increase risk of gastrointestinal infections.
• Evaluate need for long‑term therapy: limit duration when possible to reduce adverse event risk.
• Use caution in hepatic disease: liver impairment may affect drug metabolism.
• Review concomitant medications: potential for drug‑drug interactions.
• Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Lansoprazole may interact with several medicines; categorize the significance.

Major Interactions (Avoid)

• Atazanavir, nelfinavir, rilpivirine: reduced absorption leading to therapeutic failure.
• Clopidogrel: decreased activation, potentially reducing antiplatelet effect.

Moderate Interactions (Monitor Closely)

• Warfarin: possible increase in INR, requiring closer coagulation monitoring.
• Digoxin: may raise serum levels, necessitating dose adjustment.
• Methotrexate: reduced clearance, risk of toxicity at high doses.
• Oral contraceptives: decreased efficacy, consider alternative contraception.