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Lansoprazole: uses, side effects & brands
Lansoprazole is a proton-pump inhibitor for acidity and ulcers. It belongs to the Acidity, antacid & gut medicine group. These treat acidity, indigestion, ulcers, spasm and bowel problems.
Drug type — dosing is set by your doctor
| Measure | Range |
|---|---|
| Drug class | Acidity, antacid & gut medicine |
| Type | Prescription |
| Dose | Individual — ask your doctor or pharmacist |
What it is used for
- Acid reflux and heartburn
- Stomach and duodenal ulcers
- Part of H. pylori eradication treatment
- Protecting the stomach in people on NSAID painkillers
Common brand names
- India: Lan, Lanzol, Junior Lanzol
- Worldwide: Prevacid
Common side effects
- Headache
- Diarrhoea or constipation
- Nausea or tummy pain
Before taking it — precautions
- Take before a meal, usually in the morning
- Long-term use may lower magnesium, vitamin B12 and bone strength — review with your doctor
- Tell your doctor about other medicines, e.g. clopidogrel, methotrexate or HIV medicines
When to see a doctor urgently
- Black, tarry stools or vomiting blood (urgent)
- Difficulty swallowing or unexplained weight loss
- Severe or persistent watery diarrhoea
Not a prescription — no dose shown. The right dose of lansoprazole depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.
Frequently asked questions
Does lansoprazole work immediately?
It may take a few days for full effect; it is not meant for instant relief like antacids.
Can I open the capsule?
Some forms can be opened or dissolved — ask your pharmacist about your product; do not crush the granules.
Should I stop it suddenly?
After long-term use, acid can bounce back. Talk to your doctor about stopping gradually.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.