About lansoprazole
Proton pump inhibitor
Used for
- Treats gastroesophageal reflux and erosive esophagitis
- Treats stomach or duodenal ulcers
- Helps eradicate Helicobacter pylori with antibiotics
- Treats excess stomach acid, such as Zollinger-Ellison syndrome
Usual adult dose
Usually 15–30 mg once daily; dose and duration depend on the condition. For H. pylori, typically 30 mg twice daily with antibiotics.
Usual dose in children
For reflux or erosive esophagitis, usually 15 mg daily under 30 kg or 30 mg daily at least 30 kg, for up to 12 weeks.
Common side effects
- Headache
- Diarrhea or constipation
- Nausea or abdominal pain
- Long-term use may lower magnesium or vitamin B12
Important warnings
- Long-term use may increase fracture, intestinal infection, or stomach-polyp risks
- Seek assessment for trouble swallowing, unexplained weight loss, or persistent vomiting
- Rarely causes severe allergic reactions or kidney inflammation
- Use the prescribed duration; abrupt symptom improvement does not rule out serious disease
Pregnancy
Human pregnancy data are limited; use when clinically needed after weighing potential benefits and risks.
Breastfeeding
It is unclear whether lansoprazole passes into breast milk; discuss treatment options with a healthcare professional.
Interactions
- Rilpivirine-containing medicines: avoid combination
- Warfarin: may increase bleeding risk; monitoring may be needed
- Methotrexate: may increase methotrexate exposure
- May affect absorption of medicines needing stomach acid, including some antifungals
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.