<unk> , sold under the brand name Dalgan, is an atypical opioid analgesic which is used in the treatment of pain. It is used by intravenous infusion and intramuscular injection.<unk>  is an opioid receptor modulator, acting as a partial agonist of the μ- and κ-opioid receptors. It has a similar profile of effects to related opioids acting at the μ-opioid receptor, including analgesia and euphoria. Unlike other opioids acting at the κ-opioid receptor however,<unk>  does not produce side effects such as dysphoria or hallucinations at any therapeutically used dose.<unk>  was first synthesized in 1970. It was introduced for medical use in the United States in 1986 but was not marketed in other countries.<unk>  was discontinued in the United States in 2011 with no official reason given. However, it has become one of the most widely used analgesics in China. In light of the opioid epidemic,<unk>  has seen a resurgence in use and interest.
Dezocine
Bremazocine
Eptazocine
Flumazenil
Midazolam
Ketazolam
Zotepine
Esketamine