Abstract: A drug used for treating ischemia and hypoxia-induced tissue necrosis or for improving cardiac function; the drug contains amniotic fluid from a non-human animal and/or an extract thereof, and an optional pharmaceutically acceptable carrier, wherein the amniotic fluid comes from chicken eggs having an embryonic age of 5-12 days, eggs from other birds corresponding to the described developmental period, embryos from rodents having a gestational age of 8-20 days, or embryos from other non-human mammals corresponding to the described developmental period. The drug may promote the growth of human umbilical vein endothelial cells, AC16 cells and chicken embryo fibroblasts, improve cardiac function after myocardial infarction, and promote cardiac cell regeneration after a myocardial infarction.