Objective To discuss the clinical features reference of severe delayed drug allergic reaction caused by medium and long and chain fat emulison process injection,and the to provide severe a for safe use were clinically.analyzed Methods The clinical data treatment of patient were with delayed allergic reaction protein retrospectively,the relevant literatures may at home cause and of abroad reviewed.allergic Results The the soy in the medium pay and long chain fat emulsion be the severe delayed reaction,and cl...