Difelikefalin

Difelikefalin, sold under the brand name Korsuva, is an analgesic opioid peptide used for the treatment of moderate to severe itching. It acts as a peripherally specific, highly selective agonist of the κ-opioid receptor (KOR).[3][4][5][6] Difelikefalin was approved for medical use in the United States in August 2021.[2][7][8] Difelikefalin acts as an analgesic by activating KO... [wikipedia]