Avastin (Bevacizumab)
Avastin is a biological drug developed to interfere with the blood supply that tumors need to grow. It is a protein prepared in the laboratory, which is not taken from human beings and, therefore, poses no risks of transmitted disease. It is a powerful drug and it's usefulness has been confirmed in patients with GBM.
The drug works by attacking a hormone VEGF, which is produced, by tumors and promotes the development of new blood vessels, which supply the tumor with nutrients and oxygen. By interfereing with the process, the drug essentially starves the tumor. It seems to be most effective when combined with effective chemotherapy.
Side effects that are common include high blood pressure and an increased risk of blood clots. The most rare and severe complication of this drug is cerebral or gastrointestinal hemorrhage.