Learn about KEYTRUDA® (pembrolizumab), an immunotherapy that works with your immune system to help fight certain cancers. Visit the patient website.

Learn how KEYTRUDA® (pembrolizumab) works with your immune system to help fight cancer cells. Watch 2 videos about immunotherapy and how it works in the body.

Explore resources for caregivers and patients designed to provide support during treatment with KEYTRUDA® (pembrolizumab). Download guides and brochures available in English and Spanish.

Learn about KEYTRUDA QLEX™ (pembrolizumab and berahyaluronidase alfa-pmph), an immunotherapy treatment. Talk to your doctor to find out more.

See how long treatment administration with KEYTRUDA® (pembrolizumab) may take, explore your options for receiving it, and learn what to expect during the process.

Learn about the side effects that may occur while taking KEYTRUDA® (pembrolizumab). Review serious side effects and common side effects with KEYTRUDA.

Learn about cost information, insurance, and potential financial assistance options with KEYTRUDA® (pembrolizumab). See more at keytruda.com.

Find answers to frequently asked questions about KEYTRUDA® (pembrolizumab) including how does KEYTRUDA work, PD-L1 testing information, and more.

View tips and resources that may help while receiving KEYTRUDA® (pembrolizumab), including what to expect with your first infusion appointment and what to know about your treatment schedule.

Review clinical trial results comparing KEYTRUDA® (pembrolizumab) to another immunotherapy in people with advanced melanoma. Learn about available treatment options.