Casopitant (INNTooltip International Nonproprietary Name),[1]: 208 former tentative trade names Rezonic (U.S.) and Zunrisa (Europe), is an NK1 receptor antagonist which was undergoing research for the treatment of chemotherapy-induced nausea and vomiting.
[2] In July 2008, the company filed a marketing authorisation application with the European Medicines Agency.
The application was withdrawn and development was discontinued in September 2009 because GlaxoSmithKline decided that further safety assessment was necessary.
[2][4] However, a 2022 review listed casopitant as under development as a potential novel antidepressant for the treatment of major depressive disorder, with a phase 2 clinical trial having been completed.
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