If someone could answer this I would be sooooo gratefull! I have been using Fentanyl for more than 5 years for migraine's. For years I wore 2 patches of 100mcg/hr and my doctor has been slowly decressing it I am now down to 25mcg. I noticed about a month ago I am lossing my hair like nuts(all over but I can really tell in the frount).I can run my hand through the top of my hair(bangs) and 10 or more hairs fall out. I asked my doctor if this is a side effect and he just says " I don't know" Has anyone else have this and if yes does it grow back? For me being a women Iam afraid.