got switched from taking 50 mg oxycontin 2x day with oxycodone for breakthrough pain. wasnt working good enough. now I am on fentanyl patch 75 mg. feel sick, dizy and really tired, cant concentrate. just put it on a few hours ago, and it said that you could feel its effects within an hour. is this too much or will my body get used to it. if the pain is lessend, then i would love to live my life again. but i had a few panic attacks today so far. will tomorow be a better day?