<prompt> Buprenorphine drug is a type ofMu paial agonistMu agonistMu paial antagonistMu antagonist  <response>: Opioid receptor Agonist Narcotics: used in pain management, treatment for opiate addiction Methadone - u agonist Buprenorphine- paial u agonist, weak kantagonist. Overdosage: can occur with Methadone, less likely with Buprenorphine paial agonist Drug Action Uses Buprenorphine paial u agonist, weak k antagonist pain management opiate addiction Bupropion Norepinephrine reuptake inhibitor Antidepressant with minimal sexual dysfunction , Smoking cessation Buspirone 5-HT paial agonist, D2 agonistantagonist Generalized anxiety disorder Opioid antagonist uses Naloxone Inactive orally t12- 1hr Morphine poisoning Naltrexone Active orally t12- 1-3 hr Opioid, alcohol dependence Nalmefene Active orally t12- 8-10hr Opioid, alcohol dependence Reference: Page No.3174 31.24 Opioid Receptor Agonists: Methadone and BuprenorphineKaplan Sadocks Comprehensive Textbook of Psychiatry, 9th Ed 