I am on methadone 100 mg daily. I have hep C also.. I have been on methadone program for almost 2 years. I have been injecting most of my methadone. I get two weeks at a time. My liver functions were slightly elevated a few months ago when I was tested. I want to know what organs are affected by this, please do not go into the infection stuff as I already know that..Oral Methadone is sterile due to the small percentage of ethyl aclcohol in it.. When I have gotten cotton fever in the past it causes me to immediatly get indo carditus. I try to keep antibiotics on hand all the time. I worked as an xray tech for 20 years so I know how to keep things sterile. I buy syringes by the case so I always use clean needles and do not share with anyone. My only concern is the by products in oral methadone that may kill me. I take the red stuff 10 mg/ml.