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A controlled-release formulation of the 5-hydroxytryptamine 3 (5-HT3) antagonist granisetron, in which granisteron is encapsulated in a biodegradable poly(ortho ester) polymer, with antiemetic activity. Upon subcutaneous administration, APF530 slowly erodes and releases the active ingredient granisetron over a period of approximately 5 days. As a selective serotonin receptor antagonist, granisetron competitively blocks the action of serotonin at 5-HT3 receptors, resulting in the suppression of nausea and vomiting. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C61567\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C61567\' NCI Thesaurus)
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