沙利度胺（thalidomide）又名反应停，初开发时用于安定以缓解妊娠反应，其后发现可产生畸胀而停止应用。近年美国开始临床试验，将其试治恶性肿瘤。肿瘤在早期无血管相通，营养物质的获取与代谢废物的排除均有困难，因而生长缓慢。可是，肿瘤可诱使宿主的血管网络长出毛细血管 Thalidomide (aka thalidomide), also known as thalidomide, was initially used for stabilization to relieve the pregnancy response and was subsequently found to distort and stop its application. In recent years, the United States has started clinical trials and tried to treat malignant tumors. Tumors have no blood vessels in the early stages, and both the acquisition of nutrients and the elimination of metabolic wastes are difficult and therefore slow. However, tumors can induce capillaries in the host’s vascular network.