FDA: Gardasil approved to prevent anal cancer

FDA NEWS RELEASE



For Immediate Release: Dec. 22, 2010
Media Inquiries: Shelly Burgess, 301-796-4651, shelly.burgess@fda.hhs.gov
Consumer Inquiries: 888-INFO-FDA

FDA: Gardasil approved to prevent anal cancer

The U.S. Food and Drug Administration today approved the vaccine Gardasil for the prevention of anal cancer and associated precancerous lesions due to human papillomavirus (HPV) types 6, 11, 16, and 18 in people ages 9 through 26 years.

Gardasil is already approved for the same age population for the prevention of cervical, vulvar, and vaginal cancer and the associated precancerous lesions caused by HPV types 6, 11, 16, and 18 in females. It is also approved for the prevention of genital warts caused by types 6 and 11 in both males and females.

“Treatment for anal cancer is challenging; the use of Gardasil as a method of prevention is important as it may result in fewer diagnoses and the subsequent surgery, radiation or chemotherapy that individuals need to endure,” said Karen Midthun, M.D., director of the FDA’s Center for Biologics Evaluation and Research.

Although anal cancer is uncommon in the general population, the incidence is increasing. HPV is associated with approximately 90 percent of anal cancer. The American Cancer Society estimates that about 5,300 people are diagnosed with anal cancer each year in the United States, with more women diagnosed than men.

Gardasil’s ability to prevent anal cancer and the associated precancerous lesions [anal intraepithelial neoplasia (AIN) grades 1, 2, and 3] caused by anal HPV-16/18 infection was studied in a randomized, controlled trial of men who self-identified as having sex with men (MSM). This population was studied because it has the highest incidence of anal cancer. At the end of the study period, Gardasil was shown to be 78 percent effective in the prevention of HPV 16- and 18-related AIN. Because anal cancer is the same disease in both males and females, the effectiveness data was used to support the indication in females as well.

Gardasil will not prevent the development of anal precancerous lesions associated with HPV infections already present at the time of vaccination. For all of the indications for use approved by the FDA, Gardasil's full potential for benefit is obtained by those who are vaccinated prior to becoming infected with the HPV strains contained in the vaccine.

Individuals recommended for anal cancer screening by their health care provider should not discontinue screening after receiving Gardasil.

As of May 31, 2010, more than 65 million doses of Gardasil had been distributed worldwide, since its approval in 2006 according to the manufacturer, Merck and Co. Inc, of Whitehouse Station, N.J. The most commonly reported adverse events include fainting, pain at the injection site, headache, nausea, and fever. Fainting is common after injections and vaccinations, especially in adolescents. Falls after fainting may sometimes cause serious injuries, such as head injuries. This can be prevented by keeping the vaccinated person seated for up to 15 minutes after vaccination. This observation period is also recommended to watch for severe allergic reactions, which can occur after any immunization.


For more information:

Gardasil Product Page

▲ News Release, Sept. 12, 2008 – FDA Approves Expanded Uses for Gardasil to Include Preventing Certain Vulvar and Vaginal Cancers
► FDA Approves Expanded Uses for Gardasil to Include Preventing Certain Vulvar and Vaginal Cancers


▲ News Release, Oct. 16, 2009 – FDA Approves New Indication for Gardasil to Prevent Genital Warts in Men and Boys
► FDA Approves New Indication for Gardasil to Prevent Genital Warts in Men and Boys

FDA: Gardasil approved to prevent anal cancer




FDA Approves Expanded Uses for Gardasil to Include Preventing Certain Vulvar and Vaginal Cancers

The U.S. Food and Drug Administration today announced the approval of the vaccine Gardasil for the prevention of vaginal and vulvar cancer caused by Human Papillomavirus (HPV) types 16 and 18 in girls and women ages 9 to 26. These two HPV types cause 70 percent of cervical cancers, and are known to also cause some vulvar and vaginal cancers, but the percentages are not well defined.

"There is now strong evidence showing that this vaccine can help prevent vulvar and vaginal cancers due to the same viruses for which it also helps protect against cervical cancer," said Jesse L. Goodman, M.D., M.P.H., director of the FDA's Center for Biologics Evaluation and Research. "While vulvar and vaginal cancers are rare, the opportunity to help prevent them is potentially an important additional benefit from immunization against HPV."

The FDA originally approved Gardasil in 2006 for girls and women ages 9 to 26 for the prevention of cervical cancer caused by HPV types 16 and 18, precancerous genital lesions caused by HPV types 6, 11, 16, and 18 and genital warts caused by HPV types 6 and 11.

HPV includes more than 100 related viruses and more than 30 types can be transmitted via sexual contact. According to the U.S. Centers for Disease Control and Prevention, HPV is the most common sexually transmitted infection in the United States with 6.2 million Americans becoming infected with genital HPV each year.

For most women, the body's own defense system will clear HPV, thereby preventing serious health problems. However, some HPV types can cause abnormal cell growth in areas of the cervix, vagina, vulva, and other areas that years later may turn into cancer.

Regarding the prevention of vulvar and vaginal cancer, Gardasil's manufacturer, Merck & Co. Inc., followed more than 15,000 participants from the original studies for about two additional years. Approximately half had received Gardasil as part of the original study — the other half did not receive Gardasil and served as a control group.

Among females who tested negative for HPV types 16 or 18 at the start of the study, Gardasil was highly effective in preventing these types of HPV-related precancerous vulvar and vaginal lesions, which are considered to be the precursors for cancer. In the control group that did not receive the vaccine, 10 individuals developed precancerous vulvar lesions and nine developed precancerous vaginal lesions, all related to HPV types 16 or 18. No one in the Gardasil group developed either kind of precancerous lesion due to HPV types 16 or 18.

There was no evidence for benefit among women found to have been previously infected, prior to immunization, with the HPV types included in the vaccine. Therefore, to receive Gardasil's full potential for benefit, it is important to be vaccinated prior to becoming infected with the HPV strains contained in the vaccine.

Gardasil's label has been revised to note that presently available information is insufficient to support use beyond age 26, the current FDA-approved age. Also, new information has been added showing that Gardasil does not protect against diseases caused by HPV types not contained in the vaccine.

No vaccine is 100 percent effective, and Gardasil does not protect against HPV infections that a woman may already have at the time of vaccination. Therefore, all women should get regular Pap tests, even after they have been vaccinated. Routine Pap screening remains critically important to detect precancerous changes, which would allow treatment before cancer develops.

Since the FDA approved Gardasil in 2006, the majority of reported adverse events have not been serious. The most commonly reported adverse events have included syncope (fainting), pain at the injection site, headache, nausea, and fever. Fainting is common after injections and vaccinations, especially in adolescents. Falls after fainting may sometimes cause serious injuries, such as head injuries, which can be prevented with simple steps, such as keeping the vaccinated person seated for up to 15 minutes after vaccination. This observation period is also recommended to watch for severe allergic reactions, which can occur after any immunization.

As part of the original approval, Merck committed to a safety surveillance study of 44,000 individuals in a managed care organization. The study is assessing short- and long-term safety for all of Gardasil's approved uses.

As with all vaccines, the FDA and the CDC continue to closely monitor Gardasil's safety. Updated safety information on Gardasil was published on July 22 and can be found at www.fda.gov/cber/safety/gardasil071408.htm.

Product approval information for Gardasil can be found at www.fda.gov/cber/products/gardasil.htm.
Merck & Co. Inc. is located in Whitehouse Station, N.J.

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FDA Approves New Indication for Gardasil to Prevent Genital Warts in Men and Boys

The U.S. Food and Drug Administration today approved use of the vaccine Gardasil for the prevention of genital warts (condyloma acuminata) due to human papillomavirus (HPV) types 6 and 11 in boys and men, ages 9 through 26.

Each year, about 2 out of every 1,000 men in the United States are newly diagnosed with genital warts.

Gardasil currently is approved for use in girls and women ages 9 through 26 for the prevention of cervical, vulvar and vaginal cancer caused by HPV types 16 and 18; precancerous lesions caused by types 6, 11, 16, and 18; and genital warts caused by types 6 and 11.

HPV is the most common sexually transmitted infection in the United States and most genital warts are caused by HPV infection.

“This vaccine is the first preventive therapy against genital warts in boys and men ages 9 through 26, and, as a result, fewer men will need to undergo treatment for genital warts,” said Karen Midthun, M.D., acting director of the FDA’s Center for Biologics Evaluation and Research.

Gardasil’s effectiveness was studied in a randomized trial of 4,055 males ages 16 through 26 years old. The results showed that in men who were not infected by HPV types 6 and 11 at the start of the study, Gardasil was nearly 90 percent effective in preventing genital warts caused by infection with HPV types 6 and 11.

Studies were conducted to measure the immune response to the vaccine in boys ages 9 through 15. The results showed that the immune response was as good as that found in the 16 through 26 years age group, indicating that the vaccine should have similar effectiveness.

The manufacturer will conduct postmarketing studies to obtain additional information on the safety and effectiveness of Gardasil in boys and men.

Gardasil is given as three injections over a 6-month period. Headache, fever and pain at the injection site, itching, redness, swelling and bruising, were the most common side effects observed.

Gardasil is manufactured by Merck and Company Inc. of Whitehouse Station, N.J.

Gardasil product information:
www.fda.gov/cber/products/gardasil.htm