Suboxone contains a combination of buprenorphine and
naloxone. Buprenorphine is an opioid medication. Buprenorphine is similar to other opioids such as morphine, codeine, and heroin however, it produces less euphoric ("high") effects and therefore may be easier to stop taking.
Naloxone blocks the effects of opioids such as morphine, codeine, and heroin.