Mediclarum
Medicine guide

Flanax Pain Reliever/Fever Reducer

220 mg · Tablet, Film Coated

  • Available without prescription
  • Nonsteroidal Anti-inflammatory Drug
Active substance
Naproxen Sodium
Made by
Belmora LLC

Quoted from the official source. Not yet reviewed by Mediclarum — the leaflet in your pack is authoritative.

At a glance

Quoted from the official label · 2020-05-15

What it is

Pain reliever/ fever reducer

Used for
  • Headache
  • Muscular aches
  • Toothache
  • The common cold
  • Backache
+3 more
How to take it

Adults and children 12 years and older: take 1 tablet every 8 to12 hours while symptoms last

Full directions ↓
Warning

Naproxen sodium may cause a severe allergic reaction, especially in people allergic to aspirin. Symptoms may include:

All warnings ↓
Good to know
  • Sold without a prescription
  • FDA enforcement reports list no ongoing recall, and none from the last two years, for this product code · checked 2026-10-02
214other products contain Naproxen Sodium — compare makers, forms and strengths

Every line above is selected, not written, from the official label. Nothing is reworded. DailyMed

What it is for

temporarily relieves minor aches and pain due to:

  • headache
  • muscular aches
  • toothache
  • the common cold
  • backache
  • menstrual cramps
  • minor pain of arthritis
  • temporarily reduces fever

From the official label · 2020-05-15 · DailyMed

How it works

From the US prescribing label for the same active substance (Naproxen). It describes the substance, not this exact product.

Naproxen has analgesic, anti-inflammatory, and antipyretic properties.

The mechanism of action of naproxen, like that of other NSAIDs, is not completely understood but involves inhibition of cyclooxygenase (COX-1 and COX-2).

Peak level after2–4 h
Half-life12–17 h
Mostly cleared after≈ 3 daysfive half-lives — our arithmetic
PeakHalf gone3 days0
The shape is a standard model drawn from the two times above, not a measurement. How fast a medicine acts and wears off also depends on the dose, the form and the person.
How the body breaks it down

Naproxen is extensively metabolized in the liver to 6-0-desmethyl naproxen, and both parent and metabolites do not induce metabolizing enzymes.

How it leaves the body

Approximately 95% of the naproxen from any dose is excreted in the urine, primarily as naproxen (<1%), 6-0-desmethyl naproxen (<1%) or their conjugates (66% to 92%).

Quoted from the prescribing label, sections “Mechanism of Action” and “Pharmacokinetics”. DailyMed · 2026-08-18

How to take it

These directions are for this exact strength and form. Another one is different.

  • do not take more than directed
  • the smallest effective dose should be used
  • drink a full glass of water with each dose
  • adults and children 12 years and older
  • take 1 tablet every 8 to12 hours while symptoms last
  • for the first dose, you may take 2 tablets within the first hour
  • do not exceed 2 tablets in any 8-to 12-hour period
  • do not exceed 3 tablets in a 24-hour period
  • children under 12 years: ask a doctor

Quoted from the official label, section “Dosage & Administration”.

Other warnings

  • Allergy alert:
  • Naproxen sodium may cause a severe allergic reaction, especially in people allergic to aspirin. Symptoms may include:
  • shock
  • facial swelling
  • asthma (wheezing)
  • hives
  • skin reddening
  • blisters
  • rash If an allergic reaction occurs,
  • stop use and seek medical help right away. Stomach bleeding warning:
  • This product contains an NSAID, which may cause severe stomach bleeding. The chance is higher
  • if you
  • have had stomach ulcers or bleeding problems
  • take blood thinning (anticoagulant) or steroid drug
  • are age 60 or older
  • take other drugs containing prescription or nonprescription NSAIDs [aspirin, ibuprofen, naproxen, or others]
  • take more or for a longer time than directed
  • have 3 or more alcoholic drinks every day while using this product. Heart attack and stroke warning:
  • NSAIDs, except aspirin, increases the risk of heart attack, heart failure, and stroke. These can be fatal. The risk is higher
  • if you use more than directed or for longer than directed.
  • Do not use
  • if you have ever had an allergic reaction to any other pain reliever/fever reducer
  • right before or after heart surgery Ask a doctor before use if
  • the stomach bleeding warning applies to you
  • you have a history of stomach problems, such as heartburn
  • you are taking a diuretic
  • you have high blood pressure, heart disease, liver cirrhosis, kidney disease, asthma, or had a stroke
  • you have a problems or serious side effects from taking pain relievers or fever reducers
  • Ask a doctor or pharmacist before use
  • if you are
  • under a doctor's care for any serious condition
  • taking any other drug When using this product
  • take with food or milk if stomach upset occurs Stop use and ask a doctor if
  • you experience any of the following signs of stomach bleeding:
  • feel faint
  • vomit blood
  • have bloody or black stools
  • have stomach pain that does not get better
  • you have symptoms of heart problems or stroke:
  • leg swelling
  • chest pain
  • slurred speech
  • trouble breathing
  • weakness in one part or side of body
  • pain gets worse or lasts more than 10 days
  • fever gets worse or lasts more than 3 days
  • you have difficulty swallowing
  • it feels like the pill is stuck in your throat
  • redness or swelling is present in the painful area
  • any new symptoms appear If pregnant or breast-feeding, ask a health professional before use. It is especially important not to use naproxen sodium during the last 3 months of pregnancy unless definitely directed to do so by a doctor because it may cause problems in the unborn child or complications during delivery.
  • Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away.

Quoted from the official label, section “Warnings”.

Keep away from children

In case of overdose, get medical help or contact a Poison Control Center right away.

Quoted from the official label, section “OTC — Keep Out of Reach of Children”.

How to store it

  • each tablet contains: sodium 20 mg
  • store at 20°-25°C (68°-77°F). Avoid high humidity and excessive heat above 40°C (104°F)
  • see end flap for expiration date and lot number

Quoted from the official label, section “Storage and Handling”.

What kind of medicine it is

Pain reliever/ fever reducer

Quoted from the official label, section “OTC — Purpose”.

Other ingredients

Relevant if you react to a dye, a preservative, lactose or gluten.

colloidal silicon dioxide, FD & C Blue#2 Aluminum Lake, hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, povidone, titanium dioxide, talc

Quoted from the official label, section “Inactive Ingredients”.

Questions about this product

Call 1-888-779-2877 M-F 9AM-5PM EST

Quoted from the official label, section “OTC — Questions”.

Ingredients people check for

Lactose, gluten, dyes, sugars and other ingredients that matter with an allergy, intolerance or diet — as this product’s FDA label lists them.

  • Titanium dioxidetitanium dioxideA whitening agent no longer allowed in food in the EU (E171).

Quoted from the FDA label. A label that does not name an ingredient is not a guarantee that the product is free of it, and formulations change. With an allergy, check the pack and ask a pharmacist.

Every version of this medicine (147)

The same active substance, strength and kind of form, from every company that sells it — with what each label lists.

Hide versions whose label lists:

Showing 80 of 80 (the first 80 are listed)

Same active substance, strength and form in other countries

Matched on active substance, strength and kind of form only. This is not a statement that the products are equivalent or interchangeable: other ingredients, release and approved uses can differ — ask a pharmacist before swapping.

Medicine passport: one printable page to show a pharmacist abroad

Canada7 matching products

Every strength and form (45)

NetherlandsNo exact match for this strength and form

Every strength and form (24)

Details

Made byBelmora LLC
Active substanceNaproxen Sodium
Used inMuscles, joints and bones
Strength220 mg
FormTablet, Film Coated
RouteOral
Packs1 BOTTLE in 1 CARTON / 24 TABLET, FILM COATED in 1 BOTTLE · 1 BOTTLE in 1 CARTON / 10 TABLET, FILM COATED in 1 BOTTLE
NDC27854-700

Source: NDC Directory · 2026-09-13 · not reviewed by a clinician

Source: US Food and Drug Administration, NDC Directory. Reuse terms: US government work (FDA).

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Other strengths and forms

3 products are sold under this name. Grouped by form; a number on a strength means several companies make it.

  • Tablet, Film Coated1 products
    • 220 mg
  • Tablet, Coated1 products
  • Tablet1 products

Same active substance

These contain the same substance. That does not mean one can replace another — ask a pharmacist.

Aleve220 mgWithout prescriptionTablet Bayer HealthCare LLC. · Naproxen SodiumAleve220 mgWithout prescriptionCapsule, Liquid Filled Bayer HealthCare LLC. · Naproxen SodiumAleve220 mgWithout prescriptionTablet Navajo Manufacturing Company Inc. · Naproxen SodiumAleve220 mgWithout prescriptionTablet Navajo Manufacturing Company Inc · Naproxen SodiumAleve220 mgWithout prescriptionTablet R J General Corporation · Naproxen SodiumAleve Back and Muscle Pain220 mgWithout prescriptionTablet Bayer HealthCare LLC. · Naproxen Sodium

See every product with Naproxen Sodium