1) Synthetic opioid 
Oxilorphan is an opioid antagonist from the morphinan family of drugs. Oxilorphan is a non-selective opioid which is a μ antagonist but a κ partial agonist. It has similar effects to naloxone, and around the same potency as an antagonist. Oxilorphan has some weak partial agonist effects and can produce hallucinogenic/dissociative effects at high...