Buprenorphine - sold under the brand name Subutex, among others, is an opioid used to treat opioid addiction, acute pain, and chronic pain. It can be used under the tongue, by injection, as a skin patch, or as an implant (the latter is not available in the UK). 

SUBOXONE tablet is supplied as an uncoated hexagonal orange tablet in two dosage strengths:
Buprenorphine 2 mg/naloxone 0.5 mg,
​Buprenorphine 8 mg/naloxone 2 mg.

Allergic contact dermatitis from buprenorphine patch (few days after removal).