Hydroxyurea Capsules USP is a medication used to treat various medical conditions, primarily certain types of cancers and certain non-malignant conditions involving abnormal blood cell production. It is available in capsule form and is usually taken orally. Hydroxyurea is commonly used in the treatment of certain types of cancers, including chronic myeloid leukemia (CML), certain types of leukemia, and certain solid tumors. It works by inhibiting the growth of cancer cells, particularly those that are rapidly dividing. Hydroxyurea Capsules USP can increase the production of fetal hemoglobin, which can improve symptoms and reduce complications associated with sickle cell disease.