Cemiplimab
Libtayo (cemiplimab) is a prescription immunotherapy medication classified as a PD-1 inhibitor. It works by helping the immune system recognize and attack cancer cells. Libtayo is used to treat certain types of skin cancers (cutaneous squamous cell carcinoma and basal cell carcinoma), non-small cell lung cancer, and cervical cancer in patients who meet specific criteria.
Libtayo is an immunotherapy drug used to treat certain skin, lung, and cervical cancers by helping the immune system fight cancer cells.
Key facts at a glance
- RxNorm
- 2058831
- Generic
- Libtayo
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Libtayo is used to treat adults with metastatic or locally advanced cutaneous squamous cell carcinoma, advanced basal cell carcinoma that has progressed after hedgehog pathway inhibitor therapy, advanced non-small cell lung cancer with high PD-L1 expression, and metastatic or recurrent cervical cancer.
Libtayo is a monoclonal antibody that blocks the PD-1 receptor on immune cells. By inhibiting PD-1, it releases the brakes on the immune system, allowing T cells to recognize and destroy cancer cells more effectively.
Libtayo is administered as an intravenous infusion by a healthcare professional. It can cause immune-mediated side effects affecting various organs including the lungs, colon, liver, and endocrine glands. Infusion reactions may occur. Patients should discuss their complete medical history and all current medications with their doctor before starting treatment. Pregnant patients should not use Libtayo as it may harm an unborn baby.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy