Avastin, also known as bevacizumab, is a targeted drug. It is mainly used for metastatic colorectal cancer, but now it is also used for the treatment of lung cancer and gynecologic tumors, and can be combined with 5-FU, or fluorouracil chemotherapy. It can be combined with 5-FU, or fluorouracil chemotherapy. During the treatment of Avastin, you need to be alert for any gastrointestinal bleeding or perforation of the digestive tract. During the use of Avastin, it is necessary to start to pay attention to the relatively slow infusion rate. The first infusion process should be controlled for about 90 minutes, and then shortened to 30-60 minutes if tolerated. Generally, as long as the speed is slow, the reaction will not be too great. The use of Avastin does not require genetic testing and can be used directly, it is a targeted anti-angiogenic drug.