Recurrent respiratory depression associated with fentanyl transdermal patch gel reservoir ingestion.

Background: Opioid abuse is common in the United States and is currently on the rise. Fentanyl transdermal patches (FTPs) have been on the market since 1991, and have recently become a popular source of opioids for abusers. There are currently two distinct FTP designs available on the market today; a gel reservoir system and a matrix construct.