SIKLOS is a prescription medication primarily used in the treatment of sickle cell anemia, a genetic disorder that affects the shape and functionality of red blood cells. The active ingredient in SIKLOS is hydroxyurea, which works by helping to prevent the formation of sickle-shaped red blood cells. By doing so, it can reduce the frequency of painful crises and the need for blood transfusions in patients with this condition. SIKLOS is available in tablet form and is typically taken once daily, with the dosage and duration of treatment being determined by the patient's medical condition and response to therapy. As with any medication, it is important for patients to follow their healthcare provider's instructions closely when taking SIKLOS and to be aware of potential side effects, which can include low blood cell counts, gastrointestinal symptoms, and skin reactions.