Hi there, thanks for asking. Usually people who have been dependent to the narcotics for a long time, are put on methadone
or buprenorphin. These medications have a long half life and the doctor can manage the dose you will be taking. He will decrease gradually and you will not feel any discomfort. They are secreted in the urine and also are in the blood and hair sample, but there is no concern in this regard. I wish you a good health.