Naproxen
Also sold as: Naprosyn, Synflex
Prescription neededAnti-inflammatory painkillers (NSAIDs)
Comes as:Tablet
Usual adult dose
Usual adult dose: 250 to 500 mg twice a day with or after food. Do not take more than 1,000 mg in 24 hours unless your doctor advises it.
Your doctor may give you a different dose. Children's doses depend on weight.
Side effects
Common
- stomach pain
- heartburn
- nausea
- headache
- drowsiness
Serious — get help
Stop taking it and see a doctor straight away if you notice:
- black or bloody stools
- vomiting blood
- severe allergic reaction (swelling of face or throat)
- chest pain or shortness of breath
Do not take it, or take care, if
- Stomach ulcer or stomach bleeding, now or before
- Severe kidney, liver or heart failure
- Asthma that gets worse with aspirin or similar painkillers
- Last 3 months of pregnancy
- Taking blood thinners such as warfarin (use with caution)
Interactions
Medicines that can react with this one.
Serious1 medicineDo not take these together unless your doctor says so.
- Warfarin
Raises the risk of serious stomach and other bleeding.
Moderate2 medicinesTake together only with care. Ask your doctor or pharmacist.
- Furosemide
Can weaken the effect of the water tablet and strain the kidneys.
- Lithium carbonate
Can raise lithium levels in the blood; levels may need checking.