NAPROXEN SODIUM

Naproxen sodium tablets, USP are nonsteroidal anti-inflammatory drugs and available as white capsule-shape tablets, containing 275 mg or 550 mg of naproxen sodium for oral administration. Naproxen sodium is a member of the arylacetic acid group of nonsteroidal anti-inflammatory drugs. The chemical name for naproxen sodium is (S)-6-methoxy-α-methyl-2-naphthaleneacetic acid, sodium salt. Naproxen sodium has a molecular weight of 252.25 and a molecular formula of C 14H 13NaO 3. It has the following structural formula: [Structural Formula] Naproxen is white to creamy crystalline powder. It is soluble in water and methanol, practically insoluble in chloroform, toluene and acetone, sparingly soluble in alcohol. Each naproxen sodium tablet, USP contains the following inactive ingredients: hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycol 400, povidone, talc, and titanium dioxide.

Naproxen sodium tablets are non-steroidal anti-inflammatory drugs indicated for: the relief of the signs and symptoms of: rheumatoid arthritis osteoarthritis ankylosing spondylitis polyarticular juvenile idiopathic arthritis Naproxen sodium tablets are also indicated for: the relief of the signs and symptoms of: tendonitis bursitis acute gout the management of: pain primary dysmenorrhea

1 General Dosing Instructions Carefully consider the potential benefits and risks of naproxen sodium tablets and other treatment options before deciding to use naproxen sodium tablets. Use the lowest effective dose for the shortest duration consistent with individual patient treatment goals [ see WARNINGS AND PRECAUTIONS (5)]. After observing the response to initial therapy with naproxen sodium tablets, the dose and frequency should be adjusted to suit an individual patient’s needs. Naproxen-containing products such as naproxen sodium tablets, and other naproxen products should not be used concomitantly since they all circulate in the plasma as the naproxen anion. 2.2 Rheumatoid Arthritis, Osteoarthritis and Ankylosing Spondylitis The recommended dosages of naproxen sodium tablets are shown in Table 1. Table 1: Recommended dosages for naproxen sodium tablets Naproxen sodium tablets 275 mg (naproxen 250 mg with 25 mg sodium) 550 mg (naproxen 500 mg with 50 mg sodium) twice daily During long-term administration, the dose of naproxen may be adjusted up or down depending on the clinical response of the patient. A lower daily dose may suffice for long-term administration. The morning and evening doses do not have to be equal in size and the administration of the drug more frequently than twice daily is not necessary. The morning and evening doses do not have to be equal in size and administration of the drug more frequently than twice daily does not generally make a difference in response. In patients who tolerate lower doses well, the dose may be increased to naproxen 1500 mg/day for limited periods of up to 6 months when a higher level of anti-inflammatory/analgesic activity is required. When treating such patients with naproxen 1500 mg/day, the physician should observe sufficient increased clinical benefits to offset the potential increased risk. 2.3 Polyarticular Juvenile Idiopathic Arthritis Naproxen solid-oral dosage forms may not allow for the flexible dose titration needed in pediatric patients with polyarticular juvenile idiopathic arthritis. A liquid formulation may be more appropriate for weight-based dosing and due to the need for dose flexibility in children. In pediatric patients, doses of 5 mg/kg/day produced plasma levels of naproxen similar to those seen in adults taking 500 mg of naproxen [ see CLINICAL PHARMACOLOGY (12)]. The recommended total daily dose of naproxen is approximately 10 mg/kg given in 2 divided doses. Dosing with naproxen tablets is not appropriate for children weighing less than 50 kilograms. 2.4 Management of Pain, Primary Dysmenorrhea, and Acute Tendonitis and Bursitis The recommended starting dose of naproxen sodium tablets is 550 mg followed by 550 mg every 12 hours or 275 mg every 6 to 8 hours as required. The initial total daily dose should not exceed 1375 mg of naproxen sodium. Thereafter, the total daily dose should not exceed 1100 mg of naproxen sodium. Because the sodium salt of naproxen is more rapidly absorbed, naproxen sodium tablets are recommended for the management of acute painful conditions when prompt onset of pain relief is desired. 2.5 Acute Gout Naproxen sodium tablets may also be used at a starting dose of 825 mg followed by 275 mg every 8 hours. 2.6 Non-Interchangeability with Other Formulations of Naproxen Different dose strengths and formulations (e.g., tablets, suspension) of naproxen are not interchangeable. This difference should be taken into consideration when changing strengths or formulations.