I'm addicted to heroin, I've got an appointmentI'm addicted to heroin, I've got an appointment to get started on methadone, on top of that i have an inpatient rehab lined up once i get methadone started, I've done some reading lately and it appears the heroin slows down body functions but when i shoot up my heart rate jumps, I take my pulse and my heart is beating 116 beats a min, after the initial rush wears off my heart then slows down to around 93-98 until the effects wear down all the way, without use my heart rate is beating at 83-88, but that is in withdrawal. I do not know what my body does if i am totally clean and not withdrawing. is that normal that heroin would speed me up? When i use i get things done and do not get "nod outs" nor can i sleep when i use. I use alone and have No friends who use any drugs to ask.