Naproxen sodium is an odorless crystalline powder, white to creamy in color. It is soluble in methanol and water. NAPRELAN Tablets contain 412.5 mg, 550 mg, or 825 mg of naproxen sodium, equivalent to 375 mg, 500 mg, and 750 mg of naproxen, and 37.5 mg, 50 mg, and 75 mg sodium respectively. Doses range from 2—4 g per 15—20 ml (3 g/15 ml is a common dosage for radiation proctitis) PR once or twice daily or as 20 g/100 ml PR once or twice daily (for ulcerative proctosigmoiditis) in literature reports. According to the U.S. Food and Drug Administration (FDA), taking too much acetaminophen can damage your liver. The recommended maximum daily dose is 4,000 milligrams (mg) per day for adults. DESCRIPTION. NAPROSYN tablets, EC-NAPROSYN (naproxen) delayed-release tablets and ANAPROX DS (naproxen sodium) tablets are nonsteroidal anti-inflammatory drugs available as follows: NAPROSYN tablets are available as yellow tablets containing 500 mg of naproxen for oral administration. Prescription naproxen oral tablets can interact with other medications, vitamins, or herbs you may be taking. An interaction is when a substance changes the way a drug works. Naproxen is a medicine called a non-steroidal anti-inflammatory drug. It is also known as 'an NSAID'. Before you take naproxen, let your doctor know if you have ever had a bad reaction to any other anti-inflammatory painkiller. Naproxen Tablets official prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions, pharmacology and more. 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. Your dose of naproxen will depend on which brand and strength you take, which condition is being treated, and your age. For arthritis, common dosages can range from 500 to 1,000 milligrams (mg). 5 mg/kg/dose PO once daily has been recommended. A general dosage range of 1 to 5 mg/kg/day PO is recommended for aspirin when used as antiplatelet therapy in the ACCP pediatric antithrombotic therapy guidelines.