Already taking methadone for chronic pain. RX'd the fentanyl patches but they arent working for rotator cuff injury pain. Why not?

Methadone. Okay there is a problem with this picture - Methadone is a long acting medication and may be very appropriate for chronic pain (it is also used in addiction) - now you have Fentanyl patches - a long acting medication used in pain - why in the world were you given fentanyl patches when you are already on methadone. You cannot and must not use two long acting analgesics together.