It’s also used to treat sickle cell disease. Hydroxyurea is a prescription drug. It comes in two forms: a capsule and a tablet. You take both forms by mouth. Hydroxyurea oral capsule is ...

Of the 2,147 participants, 1,240 (58%) had used hydroxyurea; of those, the average time on hydroxyurea was 5.1 years, with 304 children aged eight or older on continuous hydroxyurea therapy.