Lansoprazole
Also sold as: Prevacid, Zoton
Prescription neededAcidity and ulcers
Comes as:Capsule
Usual adult dose
Usual adult dose: 15 to 30 mg once a day before breakfast for 4 to 8 weeks. For H. pylori it is combined with antibiotics as prescribed.
Your doctor may give you a different dose. Children's doses depend on weight.
Side effects
Common
- headache
- stomach pain
- nausea
- diarrhoea or constipation
Serious — get help
Stop taking it and see a doctor straight away if you notice:
- severe or watery diarrhoea that does not stop
- low magnesium with long use (muscle cramps
- irregular heartbeat)
- bone fractures with long use
- severe skin reaction
Do not take it, or take care, if
- Warning signs such as weight loss, trouble swallowing, vomiting blood or black stools — see a doctor first
- Liver disease (use with caution)
- Long-term use only if your doctor advises
Interactions
Medicines that can react with this one.
Moderate3 medicinesTake together only with care. Ask your doctor or pharmacist.
- Clopidogrel
Lansoprazole may reduce the activation of clopidogrel.
- Itraconazole
Reduced stomach acid lowers absorption of itraconazole capsules.
- Methotrexate
Can raise methotrexate levels, especially with high doses.