Comparative prices of diverted buprenorphine/naloxone and buprenorphine in a UK prison setting: a cross-sectional survey of drug using prisoners.

Background: There is evidence regarding the abuse potential of buprenorphine in prison settings. There is also emerging evidence from community settings that buprenorphine/naloxone is less amenable to abuse than the single preparation buprenorphine hydrochloride as evidenced by cost-differentials of diverted medication. This study sought to explore cost-differentials within a prison setting of diverted buprenorphine/naloxone medication relative to either single preparation buprenorphine hydrochloride or methadone.

Methods: Cross-sectional survey in one remand prison.

Results: A total of 85 prisoners participated in the survey. Prisoners estimated buprenorphine to have a significantly (p<0.001) higher cost than buprenorphine/naloxone both inside and outside of prison. This finding was supported when the analysis was restricted to both the prisoners with a longer-term experience of taking opioid substitution drugs during their current prison stay and those with a longer-term experience prior to reception.

Conclusions: Consideration should be given to the recommendation that buprenorphine/naloxone medication is the prescribed buprenorphine preparation of choice for clinicians offering opiate substitution therapy to prisoners, pending developments of buprenorphine preparations that have less abuse potential than sublingual preparations.