Naproxen: Uses, Dosage, Side Effects & Precautions| Medkart

Naproxen is the generic name of a painkiller from the non-steroidal anti-inflammatory group of medicines. It is used to ease pain and swelling in conditions such as arthritis, gout and period pain.

In India it is sold as tablets under several brand names and in more than one strength. Some packs contain the medicine alone and others combine it with a second ingredient, so the details differ between products.

What Is the Naproxen Mechanism of Action?

Naproxen is a non-steroidal anti-inflammatory drug that works by blocking chemicals linked to pain. MedlinePlus[1] explains that it stops the body from making a substance that causes pain, fever and inflammation.

The NHS[2] describes it as a painkiller that relieves pain and reduces swelling. The US prescribing information for Naprosyn on DailyMed[3] classifies it as a propionic acid derivative.

That label gives the fuller picture of the naproxen mechanism of action. It says the mechanism is not completely understood, but that it involves blocking the enzymes known as COX-1 and COX-2.

No Indian regulatory source on the schedule of this medicine could be opened for this article.

What Are the Main Naproxen Uses?

Naproxen uses centre on pain and inflammation. MedlinePlus lists osteoarthritis, rheumatoid arthritis, juvenile arthritis, ankylosing spondylitis, bursitis, tendinitis, gout and menstrual pain.

The NHS lists period pain, joint and muscle pain, gout, osteoarthritis and rheumatoid arthritis. The naproxen benefits that both sources describe are relief of pain and a reduction in swelling.

These lists come from UK and US sources, and they do not describe the approved indications of any Indian product.

Is Naproxen for Headache Relief an Option?

It can be. The NHS page on anti-inflammatory painkillers[4] lists headaches among the problems these medicines treat, and names naproxen as one of them.

The medicine also appears in combination tablets with sumatriptan. DailyMed[5] lists the US combination Treximet for treating migraine attacks, and says it is not meant for preventing them. Medkart lists Indian packs under naproxen 500 mg with sumatriptan 85 mg.

The Treximet label warns that using medicines for acute migraine on 10 or more days a month may make headaches worse. NHS migraine guidance[6] advises against painkillers on more than 2 days a week for a similar reason. Any use of naproxen for headache should be agreed with a prescriber.

Popular Brands Containing Naproxen

Several brands are sold in India. The company names below are those shown on each Medkart listing, and every one of these packs is marked as a prescription item.

Brand Name	Active Ingredient	Available Strengths / Forms*	Manufacturer / Company
Naprosyn	Naproxen	500 mg tablets	RPG Life Sciences Limited
Naprosyn Plus	Naproxen	275 mg tablets and 550 mg tablets	RPG Life Sciences Limited
Napra S	Naproxen	550 mg tablets	Intas Pharmaceuticals Limited
Xenobid	Naproxen	275 mg tablets	Shreya Life Sciences Private Limited
Dorjek	Naproxen	250 mg tablets	Scepter Lifesciences Private Limited
Naproxen 250	Naproxen	250 mg tablets	Psycogen Captab

Examples of listed strengths and forms, not a complete catalogue. Product ranges can change.

Composition and Available Strengths

Medkart lists tablets under naproxen 250 mg and naproxen 500 mg. It also lists packs under naproxen 275 mg and the higher naproxen 550 mg.

The US label explains why there are two sets of figures. It treats 550 mg of the sodium salt as equal to 500 mg of the base drug, and the pack of an Indian product states which form it contains.

MedlinePlus lists regular, delayed-release and extended-release tablets, along with an oral suspension.

A strength such as naproxen 500 mg describes the amount of active ingredient in that product. It is product information, not a dosing instruction.

How Is Naproxen Dosage Decided?

There is no single naproxen dosage that applies to every prescription, because the condition, the product and the person all come into it.

DailyMed directs prescribers to the lowest effective dose for the shortest duration that fits the treatment goals. For rheumatoid arthritis, osteoarthritis and ankylosing spondylitis it gives 250 to 500 mg of Naprosyn twice daily.

For acute gout the same label gives 750 mg, followed by 250 mg every 8 hours. The NHS says the medicine is usually taken up to 3 times a day, depending on the product and the reason it is used.

DailyMed says enteric-coated EC-Naprosyn should not be broken, crushed or chewed, and does not recommend it for starting treatment of acute pain because its absorption is delayed.

A prescriber decides what is appropriate for a particular person.

What Are the Common Naproxen Side Effects?

The common naproxen side effects listed by the NHS include constipation, diarrhoea, bloating, stomach pain, feeling or being sick, headaches, dizziness, drowsiness, rash and ringing in the ears. MedlinePlus adds gas, excessive thirst and difficulty sleeping.

The NHS lists rarer serious effects, including:

Stomach ulcers or bleeding inside the stomach
Kidney problems
Blood disorders
Heart failure
A severe allergic reaction

It says the risk rises with a high dose or with long-term use. Black, sticky poo and vomiting blood are among the signs of bleeding that it names.

Can Naproxen Be Taken on an Empty Stomach?

It is better not. The NHS says the medicine should ideally be taken with or after food to help protect the stomach, and that a doctor may also prescribe a second medicine such as omeprazole.

Both MedlinePlus and DailyMed carry a boxed warning. It covers ulcers, bleeding and perforation in the stomach or intestines, as well as a higher risk of heart attack and stroke.

What Precautions Apply Before Taking Naproxen?

The NHS lists several situations that need a check with a doctor or pharmacist before treatment starts.

Situation	What to do
A past reaction to an anti-inflammatory painkiller	The NHS says to mention any previous allergic reaction to naproxen, ibuprofen, aspirin or a similar medicine. DailyMed lists asthma, hives or allergic-type reactions after aspirin or a related painkiller as reasons not to use it.
Stomach ulcer or bowel disease	The NHS lists a stomach ulcer, Crohn’s disease and ulcerative colitis among the conditions to raise first.
Heart, liver or kidney problems	The NHS lists heart, liver and kidney conditions, and a past stroke. DailyMed states that the medicine must not be used around heart bypass surgery.
Bleeding problems	The NHS lists problems with blood clotting among the situations needing advice first.
Pregnancy	The NHS says the medicine should be avoided in pregnancy unless a doctor or pharmacist advises it. DailyMed advises limiting this group of painkillers between about 20 and 30 weeks, and avoiding them from about 30 weeks.
Breastfeeding	The NHS says the medicine is not usually used while breastfeeding, because small amounts pass into breast milk. It names ibuprofen as a safer choice at that time.

Which Medicines Can Interact with It?

Several groups can. The NHS names anticoagulants such as warfarin, steroids such as prednisolone, antidepressants such as citalopram, diuretics such as furosemide, blood pressure medicines such as enalapril, and methotrexate.

MedlinePlus adds SSRI and SNRI antidepressants, while DailyMed lists lithium, digoxin and antacids among its interaction headings.

The NHS advises against taking naproxen at the same time as other anti-inflammatory painkillers, such as ibuprofen or aspirin. It also advises limiting alcohol, which can raise the risk of stomach ulcers or bleeding.

Generic Naproxen Vs Brand-Name Naproxen

Generic and branded versions contain the same active ingredient. The US FDA[7] states that a generic medicine matches the brand on active ingredient, strength, dosage form and route, is bioequivalent, and carries the same risks and benefits.

That is the U.S. FDA standard, and an India-specific regulatory source is needed before making the same claim about an Indian product.

Products can still differ in manufacturer, inactive ingredients, appearance and price. The same active ingredient and strength alone do not prove that two products are interchangeable, so a doctor or pharmacist should confirm any switch between brands.

Buy or Compare Naproxen Tablets on Medkart

Medkart sells naproxen tablets online from several manufacturers, in plain and combination forms. Medkart states that the medicines it sells are sourced from WHO-GMP certified manufacturers.

The medicines index shows what is listed, and stock can change. The details a reader can compare on Medkart’s medicine comparison tool include:

Active ingredient
Strength
Dosage form
Manufacturer
Pack size
Current price

The tool can suggest a naproxen alternative with a similar composition. Any suggested alternative should be discussed with a doctor or pharmacist before changing a prescribed medicine.

Key takeaways

Naproxen is a non-steroidal anti-inflammatory painkiller that relieves pain and reduces swelling.
The US label says the naproxen mechanism of action is not completely understood but involves blocking the COX-1 and COX-2 enzymes.
Its main uses include arthritis, gout, tendon and bursa problems, and period pain.
The naproxen benefits described by MedlinePlus and the NHS are relief of pain and reduced swelling.
For migraine, it appears in combination tablets with sumatriptan, which the US label gives for treating attacks rather than preventing them.
A strength such as naproxen 500 mg is product information, not an instruction about how much to take.
The NHS advises taking it with or after food rather than on an empty stomach.
Blood thinners, other anti-inflammatory painkillers, some antidepressants and blood pressure medicines should be checked with a pharmacist before treatment starts.

FAQs: Common Questions About Naproxen

Q. Does food slow down how quickly naproxen works?

Yes, it can. The DailyMed label reports that food kept the tablets in the stomach longer and pushed back the time to peak blood levels. MedlinePlus still notes that nonprescription versions may be taken with food or milk to prevent nausea.

Q. What happens if a dose of naproxen is missed?

It depends on how close the next dose is. MedlinePlus says a missed dose should be taken once it is remembered, and skipped if the next one is almost due. The NHS adds that two doses should never be taken together to make up for a forgotten one.

Q. What happens if someone takes too much naproxen?

The NHS says one extra dose is unlikely to cause problems, but that taking too much can sometimes be dangerous and needs medical advice. MedlinePlus lists extreme tiredness, stomach pain, heartburn, vomiting and slow or difficult breathing among overdose symptoms, which call for urgent help.

Q. Can naproxen be taken with paracetamol?

Yes, for a short time. The NHS says the two can be taken together, as can naproxen and co-codamol, where needed for a short period. Paracetamol is not an anti-inflammatory painkiller, which is why this pairing is treated differently from combining two medicines of the same group.

Q. How long can naproxen be taken?

That depends on who is overseeing it. The NHS says the medicine should not be used for more than 3 days when bought without a prescription in the UK. Packs listed in India are prescription items, so the length of a course is set by the prescriber.

Q. What is a naproxen alternative for someone who cannot take it?

It depends on why the medicine is unsuitable. The NHS names ibuprofen as the safer choice during breastfeeding, but it also lists ibuprofen among the medicines covered by a past allergic reaction of this kind. The choice of a replacement belongs to the prescriber, who knows the condition being treated.

References

Medical disclaimer: This article provides general information and does not replace advice from a doctor or pharmacist. Naproxen is a non-steroidal anti-inflammatory drug, and the naproxen packs listed on Medkart are sold as prescription medicines. Brands with the same composition should only be substituted under the guidance of a healthcare professional or pharmacist because product details and approved indications can differ.

Naproxen: Uses, Dosage, Side Effects and Precautions