Naproxen (Aleve®; Anaprox®; Anaprox® DS; EC-Naprosyn®; Naprelan® Naprosyn®) belongs to a class of medications called non-steroidal anti-inflammatory drugs (NSAIDs), which work by reducing the levels of a chemical called prostaglandin, that causes pain, inflammation and fever. Specifically, naproxen works by blocking an enzyme called cyclooxygense, which makes prostaglandin, and thereby reduces or temporarily eliminates pain, fever and inflammation. Naproxen was approved by the FDA in 1991 and is available by prescription. There are side effects associated with this NSAID, and it can interact with some other prescription medications, so it is important to discuss using this medication with your prescribing physician. Naproxen is FDA pregnancy category C, which means that animal studies have revealed evidence of decreased fetal body weight, an increase in embryofetal death, and an increase in the total incidences of fetal abnormalities, so it should not be used during pregnancy. However, breastfeeding while on naproxen is not contraindicated because concentrations found to-date in breast milk are considered low and probably not harmful to an infant. It is always best to consult with your doctor before using any medication.