Avastin (Bevacizumab) Side Effects

NewsGuard 100/100 Score

Most anti-cancer drugs are associated with moderate to severe side effects and Avastin (bevacizumab) is no exception. The side effects of Avastin occur either as reactions to infusion of the drug or in response to the drug itself.

Infusion-related side effects

Side effects associated with the intravenous infusion of Avastin may be seen for up to 24 hours after infusion and examples include:

  • Flu-like symptoms such as fever, chills, dizziness and weakness
  • Skin rash that may appear red, warm and itchy
  • Angioedema or allergic reactions leading to swelling in the lips, tongue or back of the throat making it difficult to swallow or breathe
  • Wheezing or coughing
  • Pain in the back or abdomen
  • Tightness and pain in the chest

Other side effects

Examples of side effects that may occur for up to days or weeks after the infusion include:

  • Nausea and vomiting – Usually anti-emetics or drugs that prevent nausea are prescribed to control these symptoms
  • Loss of appetite – A dietician or a nutritional advisor may help plan a healthy diet that helps prevent malnutrition due to loss of appetite.
  • High blood pressure – Blood pressure is routinely monitored among patients receiving Avastin to check for abnormal changes. Headaches, nose bleeds or dizziness may indicate a change in blood pressure.
  • Mouth ulcers and sores – These may be prevented by drinking plenty of fluids, maintaining good oral hygiene and supplementing nutrients in diet.
  • Increased risk of developing blood clots – This increase in risk is more common among individuals who are already at risk of such clots. Possible signs of blood clotting include chest pain, breathlessness, changes in vision, difficulty speaking, paralysis of the limbs and swelling, pain, or redness in one of the arms or legs. This condition may be life threatening if not treated promptly.
  • Increased vulnerability to infections – Avastin can reduce the number of white blood cells in the body and increase susceptibility to infection. Common symptoms include high fever and chills.
  • Risk to unborn baby – Avastin may be harmful to the fetus or a nursing infant.

Further Reading

Last Updated: Jul 14, 2023

Dr. Ananya Mandal

Written by

Dr. Ananya Mandal

Dr. Ananya Mandal is a doctor by profession, lecturer by vocation and a medical writer by passion. She specialized in Clinical Pharmacology after her bachelor's (MBBS). For her, health communication is not just writing complicated reviews for professionals but making medical knowledge understandable and available to the general public as well.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Mandal, Ananya. (2023, July 14). Avastin (Bevacizumab) Side Effects. News-Medical. Retrieved on June 13, 2024 from https://www.news-medical.net/health/Avastin-(Bevacizumab)-Side-Effects.aspx.

  • MLA

    Mandal, Ananya. "Avastin (Bevacizumab) Side Effects". News-Medical. 13 June 2024. <https://www.news-medical.net/health/Avastin-(Bevacizumab)-Side-Effects.aspx>.

  • Chicago

    Mandal, Ananya. "Avastin (Bevacizumab) Side Effects". News-Medical. https://www.news-medical.net/health/Avastin-(Bevacizumab)-Side-Effects.aspx. (accessed June 13, 2024).

  • Harvard

    Mandal, Ananya. 2023. Avastin (Bevacizumab) Side Effects. News-Medical, viewed 13 June 2024, https://www.news-medical.net/health/Avastin-(Bevacizumab)-Side-Effects.aspx.


The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
Post a new comment

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.