Duragesic Information from ALZA Corporation
Drug manufacturer's website containing information on Duragesic.

Duragesic Information from the U.S. Food and Drug Administration (FDA)
From the FDA's Center for Drug Evaluation and Research.

MedlinePlus Drug Information: Fentanyl Transdermal System (marketed as Duragesic)
Duragesic information from the U.S. National Library of Medicine and the National Institutes of Health.

The American Pain Society
An organization dedicated to advancing pain-related research, education, treatment and professional practice.

The American Pain Foundation
An organization dedicated to improving the quality of life of people with pain by raising public awareness, providing information, promoting research, and advocating increased access to effective pain management.