Nivolumab 100 is a medication used in the treatment of cancer. It is a type of immunotherapy that works by blocking the activity of a protein called the PD-1 receptor on the surface of T cells, which normally helps to control the immune response and prevent immune cells from attacking normal cells in the body.

By blocking the PD-1 receptor, nivolumab allows T cells to recognize and attack cancer cells, improving the body's ability to fight cancer.

The recommended dose of nivolumab may vary depending on the type and stage of cancer being treated as well as other individual factors such as weight and overall health. It is usually administered as an intravenous infusion over a period of 30 minutes to 1 hour every 2 or 4 weeks depending on the specific treatment regimen.

It is important to take nivolumab exactly as prescribed by your doctor, and to follow all instructions regarding monitoring and management of potential side effects.