2 yrs.   Before that I struggled with opioid use on and off since a significant work related lower back injury and surgery in the 90s.  Before starting suboxone 2 years ago I had not used opioids for over 12 years except 6 months before I started the suboxone I was occasionally using Unprescribed  pain killers and I was afraid I would get physically addicted again so I choose to start taking suboxone.   