The present invention provides a prasugrel hydrochloride and the liek with lowering content of OXTP.The present invention provides a method for preparing the prasugrel hydrochloride with lowering content of OXTP, wherein the prasugrel hydrochloride with lowering content of OXTP is obtained by dissolving prasugrel free body in the inert solvent, then dropping or adding hydrochloric acid to react with it.本發明提供降低OXTP含量之普拉格雷鹽酸鹽等。本發明提供將一種降低OXTP含量之普拉格雷鹽酸鹽之製造方法,係將含有OXTP之普拉格雷游離體溶解於惰性溶媒中,藉由滴下或添加鹽酸使其反應,而降低OXTP含量。