ZEJULA, generically known as niraparib, is a prescription medication used in the treatment of certain types of cancer, specifically ovarian, fallopian tube, and primary peritoneal cancer. It belongs to a class of drugs known as PARP inhibitors, which work by preventing cancer cells from repairing their damaged DNA, leading to their death and potentially slowing the progression of the disease. ZEJULA is often prescribed for maintenance treatment, meaning it is used to keep the cancer from coming back after it has responded to initial treatment. It can be prescribed for use alone or in combination with other cancer treatments. As with any medication, it is important to use ZEJULA under the guidance of a healthcare professional, who can provide information on the correct dosage and potential side effects.