•Potential for addiction and misuse
•Dangerously slow breathing (respiratory depression)
•Risk for opioid overdose
•Difficulty concentrating and extreme sleepiness
•Harm to newborns when taken during pregnancy
•Serious risks with patch exposure to high temperatures (e.g., heat, high fever)
•Low adrenal hormone levels
•Low blood pressure
•Liver damage
•Withdrawal symptoms
•Seizures
•Life-threatening heart rhythm problems (QT prolongation)