WebMD
Web Md: Drugs and Medications: Codeine
Here at WebMD, you will find detailed notes on codeine as well as responses to several questions about this drug, which is used as a pain killer. Learn about how codein affects a user's body and how codeine interacts with other drugs.
US National Library of Medicine
Medline Plus: Acetaminophen and Codeine
This resource provides information about the prescriptions acetaminophen and codeine.