描述： Gefapixant (AF-219, MK-7264, R1646, RG-1646, RO 4926219) 是一种口服的人源P2X3 receptor小分子拮抗剂，对recombinant hP2X3 homotrimers 和 hP2X2/3 heterotrimeric receptors的IC50分别为约30 nM，100-250 nM。 Gefapixant具有治疗顽固性和不明原因慢性咳嗽的前景。 Information Gefapixant Gefapixant (AF-219, MK-7264, R1646, RG-1646, RO 4926219) is an orally active small molecule antagonist of human P2X3 receptor with IC50 of about 30 nM, 100–250 nM for recombinant hP2X3 homotrimers and hP2X2/3 heterotrimeric receptors , respectively. Gefapixant has shown promise for the treatment of refractory and unexplained chronic cough. Targets hP2X3 (Cell-free assay); hP2X2/3 (Cell-free assay) 30 nM; 100-250 nM