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Related to Naprosyn: naproxen, Flexeril


trademark for preparations of naproxen, a nonsteroidal antiinflammatory drug.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Apo-Naproxen, EC-Naprosyn, Gen Naproxen, Naprosyn, Naprosyn-E, Naprosyn-EC (UK), Naprosyn SR, Novo-Naprox, Nu-Naprox, Nycopren (UK), PMS-Naproxen EC, Riva-Naproxen

naproxen sodium

Aflaxen, Aleve, Anaprox, Anaprox DS, Apo-Napro-Na, Apo-Napro-Na DS Arthroxen (UK), Gen-Naproxen EC, Napratec (UK), Naprelan, Novo-Naprox Sodium, Novo-Naprox Sodium DS, Riva-Naproxen Sodium, Synflex, Synflex (UK)

Pharmacologic class: Nonsteroidal anti-inflammatory drug (NSAID)

Therapeutic class: Nonopioid analgesic, antipyretic, anti-inflammatory

Pregnancy risk category B (first and second trimesters) D (third trimester)


Unknown. Thought to inhibit prostaglandin synthesis.



Oral suspension: 125 mg/5 ml

Tablets: 250 mg, 375 mg, 500 mg

Tablets (delayed-release): 375 mg, 500 mg

naproxen sodium

Caplets, tablets: 220 mg, 275 mg, 550 mg

Tablets (controlled-release): 375 mg, 500 mg, 750 mg

Indications and dosages

Pain; osteoarthritis; ankylosing spondylitis; dysmenorrhea; bursitis; acute tendinitis

Adults: 250 to 500 mg (naproxen) P.O. b.i.d. (up to 1.5 g/day); 375 to 500 mg (naproxen delayed-release) P.O. t.i.d.; 250 mg, 375 mg, or 500 mg (naproxen oral suspension) P.O. b.i.d.; 275 to 550 mg (naproxen sodium) P.O. b.i.d. (up to 1.65 g/day)

Children: 10 mg/kg P.O. daily in two divided doses (naproxen only)

Mild to moderate pain; primary dysmenorrhea

Adults: Initially, 500 mg (naproxen) P.O., followed by 250 mg q 6 to 8 hours p.r.n., to a maximum of 1.25 g/day. Or initially, 550 mg (naproxen sodium) P.O., followed by 275 mg q 6 to 8 hours p.r.n., to a maximum of 1,375 mg/day.


Adults: Initially, 750 mg (naproxen) P.O., followed by 250 mg q 8 hours or initially, 825 mg (naproxen sodium) P.O., followed by 275 mg q 8 hours. On day 1,1,000 to 1,500 mg (naproxen sodium controlled-release formulation) P.O. once daily, followed by 1,000 mg once daily until attack has subsided.

Management of pain, primary dysmenorrhea, acute tendinitis and bursitis

Adults: Initially, two 500-mg naproxen sodium controlled-release tablets P.O. once daily. Or, for patients requiring greater analgesic benefit, two 750-mg naproxen sodium controlled-release tablets P.O. once daily. Or, three 500-mg naproxen sodium controlled-release tablets may be used for a limited period. Thereafter, total daily dose shouldn't exceed two 500-mg tablets.

Rheumatoid arthritis, osteoarthritis, ankylosing spondylitis

Adults: Initially, two 375-mg naproxen sodium controlled-release tablets P.O. once daily, one 750-mg tablet P.O. once daily, or two 500-mg tablets P.O. once daily. During long-term administration, adjust dosage up or down depending on patient's clinical response. Use lowest effective dose in all patients. (Patients already taking naproxen 250 mg, 375 mg, or 500 mg b.i.d. may have their total daily dosage replaced with naproxen sodium controlled-release tablets as a single daily dose.)

Dosage adjustment

• Renal or hepatic impairment

• Elderly patients


• Hypersensitivity to drug or other NSAIDs

• Asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs

• Perioperative pain in the setting of coronary artery bypass graft surgery


Use cautiously in:

• severe cardiovascular, renal, or hepatic disease

• advanced renal disease (not recommended)

• history of ulcer disease or GI bleeding (use with extreme caution)

• chronic alcohol use or abuse

• elderly patients

• pregnant patients

• breastfeeding patients (avoid use)

• children (naproxen sodium controlled-release) and naproxen use in children younger than age 2 (safety not established).


• Give with food or milk to avoid GI upset.

Adverse reactions

CNS: dizziness, drowsiness, headache, vertigo, light-headedness

CV: palpitations, tachycardia, hypertension

GU: renal toxicity (with long-term use in patients in whom renal prostaglandins have a compensatory role in maintenance of renal perfusion), renal papillary necrosis

EENT: visual disturbances, tinnitus, auditory disturbances

GI: nausea, diarrhea, constipation, heartburn, abdominal pain, stomatitis, GI bleeding

Skin: rash, pruritus, skin eruptions, sweating, photosensitivity, exfoliative dermatitis, Stevens-Johnson syndrome, toxic epidermal necrolysis

Other: thirst, edema, allergic reactions including anaphylaxis


Drug-drug. Acetaminophen (chronic use), cyclosporine: increased risk of adverse renal effects

Anticoagulants, thrombolytics: increased anticoagulant effect

Antihypertensives, cefamandole, cefoperazone, cefotetan, diuretics, eptifibatide: decreased response

Antineoplastics, methotrexate: increased risk of nephrotoxicity

Aspirin: decreased naproxen efficacy

Aspirin, corticosteroids, other NSAIDs: additive adverse GI effects

Clopidogrel, plicamycin, ticlopidine, valproic acid: increased risk of bleeding Insulin, oral hypoglycemics: increased risk of hypoglycemia

Lithium: increased lithium blood level and risk of nephrotoxicity

Other photosensitizing agents: increased risk of photosensitivity

Probenecid: increased naproxen blood level, increased risk of toxicity

Drug-diagnostic tests. Alanine amino-transferase, alkaline phosphatase, aspartate aminotransferase, blood urea nitrogen, creatinine, lactate dehydroge-nase, potassium: increased levels

Bleeding time: prolonged for up to 4 days after therapy ends

Creatinine clearance, glucose, hematocrit, hemoglobin, leukocytes, platelets: decreased values

Urine 5-hydroxy-indoleacetic acid, urine steroids: test interference

Drug-herbs. Anise, arnica, chamomile, clove, dong quai, fenugreek, feverfew, garlic, ginger, ginkgo, ginseng, licorice: increased anticoagulant effect, increased risk of bleeding

Patient monitoring

• Monitor GI status. Stay alert for signs and symptoms of GI bleeding.

In long-term use, assess CBC with white cell differential and coagulation studies, and monitor for visual and hearing impairment and renal toxicity.

• Monitor cardiovascular status for tachycardia, palpitations, hypertension, and edema.

• Monitor blood glucose level closely in diabetic patients.

Monitor patient for signs and symptoms of serious skin manifestations; discontinue drug at first appearance of rash or other signs of hypersensitivity.

Patient teaching

• Tell patient to take medication with food or milk followed by 8 oz of water, and to stay upright for 30 minutes afterward.

• Inform patient that he may crush or break regular tablets but must swallow delayed- or controlled-release form whole.

• Tell patient that drug's full therapeutic effect may take up to 2 weeks.

• Caution patient not to exceed recommended dosage.

Instruct patient how to recognize and immediately report signs and symptoms of renal toxicity and serious skin manifestations.

• Advise patient to use sunscreen to prevent photosensitivity reaction.

• Instruct patient not to take over-the-counter medications unless prescribed.

• Tell patient to consult prescriber before taking herbs.

• Advise female patient to tell prescriber if she is pregnant or breastfeeding before starting drug.

• As appropriate, review all other significant and life-threatening adverse reactions and interactions, especially those related to the drugs, tests, and herbs mentioned above.

McGraw-Hill Nurse's Drug Handbook, 7th Ed. Copyright © 2013 by The McGraw-Hill Companies, Inc. All rights reserved


A trademark for the drug naproxen.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


A brand name for NAPROXEN.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
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ADAPT (Alzheimer's Disease Anti-Inflammatory Prevention Trial) is giving a placebo or an anti-inflammatory drug (Celebrex or Naprosyn) to healthy people aged 70 or older who have a sibling or parent with Alzheimer's or other dementia.
Antacids and sucralfate less well documented Blockage of reversal Vitamin K, vitamin K of warifan action containing foods (leafy, ([down arrow] effect) green vegetables and some beans and peas) Induction of warfarin metabolizing Barbiturates, carbamazepaine, enzymes in the liver phenytoin, griseofulvin, ([down arrow] effect) rifampin Displacement of protein binding Aspirin, NSAIDS (i.e., ([up arrow] effect) ibu/keto-profen, naprosyn), acetaminophen, chloral hydrate, dipyridamole, phenylbutazone Inhibition of warfarin Allopurinol, chloramphenicol, metabolizing enzymes in the liver cimetadine, quinolones ([up arrow] effect) (i.e.
I contacted the New York clinic only to be told that her bleeding was normal and to increase her Naprosyn, which was given for pain, to every hour if needed.
AOSD was diagnosed by exclusion and the patient was started on Naprosyn (250 mg three times daily).
Subject B reported that symptom intensity was partially reduced by taking Naprosyn, Fluconazol, and Cardizem.
Naproxen (brand name Naprosyn) and naproxen sodium (Anaprox) have been sold by prescription as arthritis drugs for several years.
Such new products as Tagamet and Zantac for ulcers, Procardia and Capoten for hypertension, Mevacor for cholesterol, and Naprosyn for arthritis allowed physicians to actually control diseases that had led to fatal and crippling illnesses.
Rosen (1982) described an early successful experience with the introduction of the drug Naprosyn through direct-to-consumer prescription drug advertising in Great Britain.
Medicines that can be used include aspirin, acetaminophen (Datril, Panadol, Tylenol), ibuprofen (Advil, Medipren, Motrin, Nuprin), naproxen (Naprosyn), naproxen sodium (Anaprox), diflunisal (Dolobid), ketorolac (Toradol) and others.
Joint pain and stiffness caused by inflammation can usually be alleviated by a variety of anti-inflamitory drugs such as aspirin, Indocin and Naprosyn. Prescribed exercises done regularly, as well as physical therapy, may be helpful.
The common NSAIDs still requiring a prescription are naproxen (Naprosyn), piroxicam (Feldene), indomethacin (Indocin), tolmetin sodium (Tolectin), mefenamic acid (Ponstel), diflunisal (Dolobid), and diclofenac sodium (Voltaren).