Cyprenorphine is a drug which is an opioid

Opioid

An opioid is a psychoactive chemical that works by binding to opioid receptors, which are found principally in the central and peripheral nervous system and the gastrointestinal tract...

 derivative. It is related to more well-known opioids such as buprenorphine

Buprenorphine

Buprenorphine is a semi-synthetic opioid that is used...

, which is used as an analgesic

Analgesic

An analgesic is any member of the group of drugs used to relieve pain . The word analgesic derives from Greek an- and algos ....

 and for the treatment of opioid addiction

Substance dependence

The section about substance dependence in the Diagnostic and Statistical Manual of Mental Disorders does not use the word addiction at all. It explains:...

, and diprenorphine

Diprenorphine

Diprenorphine is an opioid antagonist used to reverse the effects of the super-potent opioid analgesics such as etorphine and carfentanil that are used for tranquilizing large animals in veterinary medicine....

, which is used as an antidote

Antidote

An antidote is a substance which can counteract a form of poisoning. The term ultimately derives from the Greek αντιδιδοναι antididonai, "given against"....

 to reverse the effects of other opioids.

Cyprenorphine has mixed agonist-antagonist effects at opioid receptors, like those of buprenorphine. However the effects of cyprenorphine are somewhat different, as it produces pronounced dysphoric and hallucinogenic effects which limit its potential use as an analgesic.