Buprenorphine is FDA approved for the treatment of acute and chronic pain as well as for the treatment of opioid use disorder.
Buprenorphine is a semi-synthetic opioid.
Buprenorphine is a partial opioid agonist at the mu-opioid receptor.
The mu-opioid receptor is directly involved in pain control and pain sensation.
Therefore, as an opioid, buprenorphine IS a pain medication and can be used for the treatment of pain.