• Ivan Urits, Omar Viswanath, Vwaire Orhurhu, Kyle Gress, Karina Charipova, Alan D Kaye, and Anh Ngo.
• Beth Israel Deaconess Medical Center, Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School, 330 Brookline Ave, Boston, MA, 02215, USA. iurits@bidmc.harvard.edu.
• Curr Pain Headache Rep. 2019 Mar 18; 23 (5): 31.

Purpose Of ReviewThe purpose of this review is to summarize the current understanding of opioid pathways in mediating and/or modulating analgesia and adverse effects. Oliceridine is highlighted as a novel mu-opioid receptor agonist with selective activation of G protein and β-arrestin signaling pathways.Recent FindingsOliceridine (TRV130; [(3-methoxythiophen-2-yl)methyl]({2-[(9R)-9-(pyridin-2-yl)-6-oxaspiro[4.5]decan-9-yl]ethyl})amine) is a novel MOR agonist that selectively activates G protein and β-arrestin signaling pathways. A growing body of evidence suggests that compared to existing MOR agonists, Oliceridine and other G protein-selective modulators may produce therapeutic analgesic effects with reduced adverse effects. Oliceridine provides analgesic benefits of a pure opioid agonist while limiting related adverse effects mediated through the β-arrestin pathway. Recent insights into the function and structure of G protein-coupled receptors has led to the development of novel analgesic therapies.

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