Hydreo 500mg Capsule is used for treating certain cancers and preventing painful episodes associated with sickle cell anemia. It can be taken with or without food, and the dose and frequency depend on the condition. It may take several weeks or months to see benefits, but it should not be stopped without a doctor's advice. Common side effects include hematological disorders, gastrointestinal symptoms, eating disorders, and weight loss. Regular blood tests are required to monitor blood cells, kidney, liver, and heart function. Hydreo is not recommended during pregnancy or breastfeeding, and effective contraception is essential.