Elitek (generic: rasburicase) is a prescription medication used to reduce high uric acid levels in adults and children with leukemia, lymphoma, and solid tumor malignancies who are receiving chemotherapy medications. When cancer cells are destroyed by chemotherapy, certain substances are released. As the body breaks these substances down, uric acid levels increase and may be harmful. Elitek is in a class of medications called urate oxidase enzymes. It works by breaking down uric acid so that the body can eliminate it.

This medication comes in an injectable form to be given directly into a vein (IV) once daily for up to 5 days.

Common side effects include nausea, vomiting, anxiety, and stomach pain.