Aleve, also referred to as naproxen sodium, or simply naproxen, is a nonsteroidal anti-inflammatory drug, rather than a blood thinner, although it can thin one's blood. This medication helps to reduce hormones in the body that cause inflammation and pain.
Aleve is a medication that is temporarily used to reduce minor aches and pains from ailments such as arthritis, muscle aches, menstrual cramps, headaches, backaches, toothaches and the common cold. The medication may also be used to temporarily reduce fever. According to MedicineNet, this medication should be avoided by individuals taking anticoagulents such as Coumadin, as the medication causes the blood to thin. In such instances, excessive blood thinning can cause bleeding.