Explains the medication naproxen (Aleve, Naprosyn, Anaprox, Naprelan) a drug used for the management of mild to moderate pain, fever, and inflammation. Article includes descriptions, uses, drug interactions, and side effects. Read more about naproxen (Aleve, Naprosyn, Anaprox, Naprelan). Along with its needed effects, naproxen may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Although not all of these side effects may occur, if they do occur they may need medical attention. 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. Stop taking naproxen and get medical help right away if you notice any of these rare but serious side effects: stomach/abdominal pain that doesn't go away, black/tarry stools, vomit that looks. Naproxen can increase your risk of fatal heart attack or stroke, especially if you use it long term or take high doses, or if you have heart disease. Even people without heart disease or risk factors could have a stroke or heart attack while taking this medicine. Naproxen oral uses, side effects, interactions, pictures, warnings common and rare effects for naproxen webmdnaproxen medicine to relieve pain swelling nhs. Naproxen uses, dosage, side effects. ANAPROX prescription and dosage sizes information for physicians and healthcare professionals. Pharmacology, adverse reactions, warnings and side effects. Pharmacology, adverse reactions, warnings. Side Effects. Drug information provided by: IBM Micromedex. Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Side effects from naproxen are more frequent if you need to take this medication over a long period of time. Digestive system complaints are the most frequent side effects of naproxen. If you are taking naproxen for a long-term condition (such as arthritis), it is usual for adults to be prescribed 500 mg-1 g daily, to be taken as either a single dose, or divided into two doses during the day. Doses for children depend upon the age of the child.