I haven't posted in a while. I am an oral cancer survivor with surgery done in May to remove it from beneath my tongue. The question I have today is unrelated but I think I could find an answer here. My doctor prescribed fentanyl patches for chronic back pain (I believe they are 50mg). I put one on during the daytime and didn't notice anything. About 3am I woke up being unable to breath, gasping for breath. I was dizzy and disoriented and very scared. Has anyone had a reaction like this to a fentanyl patch? I'm afraid to use one again.