Buprenorphine is a semi-synthetic opioid derived from thebaine. It is used for analgesic effect and opioid substitution therapy. In Turkey, buprenorphine and naloxone combination (Suboxone®) has been used in opioid substitution therapy since 2010. In this paper respiratory depression arising after buprenorphine use together with benzodiazepine will be told and possible mechanisms of this interaction will be discussed.