Main Page | See live article | Alphabetical index Fever, also known as pyrexia, is the elevation of the body's temperature above the upper limit of normal, usually taken as 37.7°C. Most fevers are caused by infections and almost all infectious diseases cause fever. Drugs that reduce fever are known as antipyretics. A common antipyretic is acetaminophen, also called paracetamol. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.