
Variety of delivery options including next day & free delivery.
Pharmacy, clinic and prescribers based in Greater Manchester.
Start your treatment with a quick and free online consultation.
Variety of delivery options including next day & free delivery.
Pharmacy, clinic and prescribers based in Greater Manchester.
Start your treatment with a quick and free online consultation.
Fill in a quick online consultation for our licensed pharmacists to review.
Our pharmacists will review your treatment to ensure it’s suitable.
Your treatment will be delivered to your door quickly & discreetly.
| Medication Name | Naprosyn 250mg & 500mg EC Tablets |
| Medication Form | Gastro-resistant tablets |
| Used for | Muscle, joint and tendon problems, back pain, arthritis, ankylosing spondylitis and period pain |
| Who can use | Adults (aged 18 years and over) |
| Active Ingredient | Naproxen 250mg or 500mg |
| Usual Dose | Depends on the condition being treated; usually 500mg to 1000mg a day for arthritis |
| Possible Side Effects | Heartburn, indigestion, stomach ache, feeling sick, diarrhoea, constipation, headache |
| Prescription Required | Yes |
| Patient Information Leaflet | Naprosyn EC Tablets Patient Information Leaflet |
Naprosyn is a prescription anti-inflammatory used to relieve pain, swelling and stiffness in your muscles and joints. It’s a type of medicine called a non-steroidal anti-inflammatory drug (NSAID) and it’s used to treat adults for:
Naprosyn EC is available in 250mg and 500mg strengths.
Each tablet contains naproxen, which blocks an enzyme the body uses to make prostaglandins, chemicals that can cause pain and inflammation. Naprosyn pain relief comes from reducing the swelling, redness and heat that build up around an inflamed muscle or joint.
EC stands for enteric-coated. These are delayed-release tablets that pass through the stomach before they dissolve. That’s why they need to be swallowed whole.
Naprosyn EC Tablets are suitable for adults aged 18 and over. They aren’t for children or teenagers under 16.
You shouldn’t take them if you:
If you’re unsure about any of these, speak to your doctor or pharmacist before taking Naprosyn.
Naprosyn doses vary depending on the condition you’re treating, so always take it as your prescriber advises.
For muscle, joint, tendon and period pain, the usual starting dose is 500mg, followed by Naprosyn 250mg every 6 to 8 hours as needed.
For arthritis and ankylosing spondylitis, the usual daily dose is 500mg to 1g. You might take Naprosyn 500mg once or twice a day, up to two 500mg tablets in total.
Older people and anyone with liver or kidney problems will usually be given a lower dose.
Older people and anyone with liver or kidney problems will usually be given a lower dose. Don’t take more than the recommended dosage or take it for longer than advised.
Like all medicines, Naprosyn can cause adverse effects, although not everybody gets them.
Tell your doctor or pharmacist if any of these are starting to affect you:
Stop taking Naprosyn and speak to a doctor straight away if you notice:
You can report side effects through the MHRA Yellow Card Scheme.
Active ingredient: naproxen 250mg or 500mg
Other ingredients: povidone, magnesium stearate, water, croscarmellose sodium, methacrylic acid-ethyl acrylate copolymer, purified talc, sodium hydroxide, triethyl citrate, iron oxide black, shellac and propylene glycol
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Naprosyn is a strong anti-inflammatory painkiller that’s prescribed at doses of up to 1g a day. It eases both pain and the swelling behind it, which is why it’s used to treat pain and inflammation in conditions like arthritis, back pain and period pain. It’s only available on prescription because NSAIDs can cause stomach, heart and kidney side effects, so a prescriber needs to check it’s suitable for you first. How well it works for you will depend on the type of pain you have.
Naprosyn is a brand name for naproxen, so the active ingredient is the same. Naprosyn EC Tablets are coated tablets that contain the same medicine as naproxen gastro-resistant tablets, so you shouldn’t take naproxen and Naprosyn together. Your prescriber will let you know which version is right for you.
You can’t buy Naprosyn over the counter, as it’s a prescription-only medicine. You can buy Naprosyn online by completing a short consultation for our pharmacists to review. If it’s suitable, your treatment will be dispatched to your door.
You should take Naprosyn EC with or after food. Don’t take it with other NSAIDs like aspirin, ibuprofen or diclofenac unless your doctor tells you to. Alcohol isn’t listed as an interaction, but alcohol and NSAIDs can both irritate the stomach, so speak to your pharmacist for advice if you drink regularly.
Naprosyn can be taken with paracetamol for a short time if needed, but speak to your doctor or pharmacist first. Paracetamol isn’t an NSAID, so it works differently to Naprosyn, but your prescriber will still want to know about every painkiller you take.
Treatment with Naprosyn EC can continue for ongoing conditions like arthritis, but only under your doctor’s supervision. The small risk of heart attack and stroke is more likely with higher doses and longer treatment. Your doctor will want to see you regularly to check your dose and look for side effects. They’ll aim to use the lowest effective dose for the shortest time needed.
Naprosyn EC isn’t for children or teenagers under 16. Speak to your GP if your child needs pain relief, as they can recommend a suitable treatment.
Skip the missed dose and take your next one at the usual time. Don’t take a double dose to make up for the one you missed.
How much you’ve taken depends on the strength of your tablets, as each 500mg tablet contains twice as much naproxen as a 250mg tablet.
Take the medicine pack with you so they know which strength you’ve taken and how much.
Page content authored by Amjad Khan, last reviewed by Mr Muhammad on 19th October 2026.



