Abstract

The transdermal delivery of opioids offers significant advantages for the management of chronic pain. Transdermal delivery avoids first pass effects, allows sustained drug administration for improved analgesia with reduced breakthrough pain, reduces peak-related side effects and improves patient compliance through reduced dosing frequency. Oxymorphone was selected for clinical development because of its high potency and low oral bioavailability; characteristics ideal for transdermal delivery. We have previously demonstrated in humans that oxymorphone could be delivered from a transdermal matrix patch when formulated with a transdermal penetration enhancer called TPM.

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