Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Cancer Health Center

Font Size

New Warning Added to Avastin Label

FDA: Cancer Drug Raises Risk of Ovarian Failure
WebMD Health News
Reviewed by Laura J. Martin, MD

Oct. 7, 2011 -- Women taking the cancer drug Avastin (bevacizumab) are at increased risk of ovarian failure, according to an FDA warning added to Avastin's label.

In a study of 179 women with colon cancer, 34% of those taking Avastin as an add-on to chemotherapy developed amenorrhea, a condition in which menstruation has ceased for three or more months, compared to 2% among those not taking the drug.

Of the women who experienced ovarian failure, 22% began menstruating again after they stopped taking Avastin.

The label tells patients: "Long term effects of Avastin exposure on fertility are unknown." The label advises doctors to discuss risks with patients prior to treatment with Avastin.

About Avastin

The drug is sold in the U.S. by San Francisco-based Genentech. It is approved to treat several types of advanced cancers, including colorectal cancer, breast cancer, kidney cancer, and lung cancer.

In June 2011, an FDA advisory panel recommended that Avastin no longer be sold as a treatment for breast cancer.

Injected every two to three weeks, Avastin works by blocking the production of blood vessels that would otherwise supply tumors with oxygen and nutrients. This slows the growth and spread of tumors. It is taken in addition to chemotherapy.

Avastin Risks

Ovarian failure was not the only warning added to the new label. Some patients taking Avastin reportedly developed osteonecrosis of the jaw, a condition in which a lack of blood flow causes bone to die. According to the FDA, the cause is unclear. But it's possible that Avastin's mechanism to prevent the formation of blood vessels may have blocked blood flow to tissue in the patients' jawbones.

The FDA reports that a new study shows further evidence that Avastin may increase the risk of blood clots associated with venous thromboembolic events (VTE), such as deep venous thrombosis and pulmonary embolism.

More than 1,400 patients with colorectal cancer that had spread participated in the study. Of those, 13.5% of those taking Avastin had some sort of VTE compared to 9.6% of patients on chemotherapy alone. After being treated with anti-clottingdrugs, those on Avastin were more likely to have another VTE or to experience bleeding.

Today on WebMD

Colorectal cancer cells
New! I AM Not Cancer Facebook Group
Lung cancer xray
See it in pictures, plus read the facts.
sauteed cherry tomatoes
Fight cancer one plate at a time.
Ovarian cancer illustration
Real Cancer Perspectives
Jennifer Goodman Linn self-portrait
what is your cancer risk
colorectal cancer treatment advances
breast cancer overview slideshow
prostate cancer overview
lung cancer overview slideshow
ovarian cancer overview slideshow
Actor Michael Douglas