Oxycodone		Acetaminophen

Percocet is a pain medication that is a mixture of acetaminophen and oxycodone.  It is considered a narcotic analgesic.  The acetaminophen is used to reduce both pain and fever.  Oxycodone is used for its calming effect and for pain.

References:
http://www.worldofmolecules.com
http://www.encyclopedia.thefreedictionary.com/oxycontin
http://www.opioids.com/chemical/
http://www.conceptimages.com
http://www.asri.edu