- Bevacizumab (Avastin™) is a type of intravenous cancer treatment called anti-angiogenic therapy (a type of therapy to treat cancer that interferes with blood flow to the tumor, thereby stopping tumor growth, and possibly leading to tumor shrinkage) made by Genentech Inc. Bevacizumab is approved by the FDA for first line treatment of metastatic colorectal cancer in combination with other chemotherapy.