For decades, the hallmark of medical treatment for cancer has been intravenous cytotoxic chemotherapy, where these drugs target rapidly dividing cells, including cancer cells and certain normal tissues. As a result, many patients experience the classic toxicities of alopecia, gastrointestinal symptoms, and myelosuppression. In the past decade, however, a dramatic shift has been witnesses in the cancer therapy. Although traditional cytotoxic chemotherapy still remains the treatment of choice for many malignancies, targeted therapies are now a component of treatment for many types of cancer, including breast, colorectal, lung, and pancreatic cancers, as well as lymphoma, leukemia, and multiple myeloma.