What is e difference between butrans patches and Fentanyl patches?

Butrans patches contain buprenorphine, a partial opioid agonist used for managing chronic pain and opioid dependence, while fentanyl patches deliver fentanyl, a potent full opioid agonist primarily for severe pain. Buprenorphine has a ceiling effect, reducing the risk of overdose, whereas fentanyl has a higher potential for dependence and overdose. Both patches are designed for transdermal delivery but differ in their opioid receptor activity and clinical applications.