Ive used heroin and being put on methadone then used dihydrocodeine to mask the sickness. Nearly got off that but got back because I fractured my knee. The surgery staff were so mad that morphine and fentanyl didnthave any impact on the pain at all. They used demerol but apart from a mood lift nothing on the pain. So now im overusing. Dont think i wznt to stop.i wake up cagey and crappy and swallow ten.