Dezocine was discovered and patented by American Home Products Corp. in 1978. Dezocine is a partial opiate drug and was used for pain management under brand name Dalgan. But then usage of this drug was discontinued in US. Dezocine acts as a partial μ-receptor agonist, a κ-receptor antagonist, and a norepinephrine and serotonin reuptake inhibitor (via norepinephrine transporter and serotonin transporter). Dezocine shares the CNS depressant and respiratory depressant effects of opioid analgesics. Dezocine has not been shown to produce clinically significant cardiovascular adverse effects.