Wikipedia states that buprenorphine (a.k.a. suboxone) has an elimination half-life ranging from 20 hours to 73 hours, with a mean of 37 hours. Based on a half-life of 37 hours, and assuming 2mg a day for the past month, how many days would it take to be effectively out of one's system?
(Answers to this question should not be considered as a substitute for advice from a medical professional).