Common side effects that occurred in more than 10 percent of people who received Avastin for different cancer types, and at least twice the rate of the comparison group, were nosebleeds, headache, high blood pressure, inflammation of the nose, too much protein in the urine, taste change, dry skin, rectal bleeding, tear production disorder, back pain, and inflammation of the skin (exfoliative dermatitis). Across all trials, treatment with Avastin was permanently stopped in 8.4 percent to 21 percent of people because of side effects.
Patients who are pregnant or thinking of becoming pregnant should talk with their doctor about the potential risk of loss of the pregnancy or the potential risk of Avastin to the fetus during and following Avastin therapy, and the need to continue an effective birth control method for at least six months following the last dose of Avastin.
Women should be advised to discontinue nursing or discontinue treatment with Avastin, taking into account the importance of Avastin to the mother.
First-line Metastatic Colorectal CancerIn the first-line metastatic colorectal cancer trial, the most common severe to life threatening side effects that increased by two percent or more in people who received Avastin plus IFL chemotherapy vs. IFL alone were weakness (10 percent vs. 7 percent), abdominal pain (8 percent vs. 5 percent), pain (8 percent vs. 5 percent), high blood pressure (12 percent vs. 2 percent), blood clots in the veins of the body (9 percent vs. 5 percent), blood clots inside the abdomen (3 percent vs. 1 percent), a brief loss of consciousness (3 percent vs. 1 percent), diarrhea (34 percent vs. 25 percent), constipation (4 percent vs. 2 percent), reduced white blood cell counts (37 percent vs. 31 percent), and reduced white blood cell counts that may increase the chance of infection (21 percent vs. 14 percent).