What is the role of hydroxyurea in the treatment of sickle cell disease?

Hydroxyurea is a primary, evidence-based medication used to prevent severe complications of sickle cell disease. It aims to improve the patient's quality of life by reducing the frequency of acute pain crises and health problems associated with blood vessel occlusion [1]. Selection of this treatment is based on a careful medical assessment of the patient's condition, and it is available for use by both adults and children aged 9 months and older, making it a cornerstone in long-term therapeutic management plans for patients suffering from recurrent crises [1] [2].

Mechanism of Action of Hydroxyurea in the Body

The primary function of hydroxyurea lies in its ability to interfere with the "sickling" process of red blood cells. In a normal state, red blood cells are disc-shaped and flexible; in sickle cell disease, the presence of abnormal hemoglobin causes cells to take on a rigid, sickle shape. These sickle cells are not only rigid but also become sticky, clumping together to block small blood vessels, which cuts off oxygen to surrounding tissues and causes sudden, severe pain crises [1]. Hydroxyurea works to reduce this sickling, allowing cells to move more fluidly through the bloodstream and maintain better oxygen levels, which decreases the frequency of the need for emergency medical care due to pain crises [2].

Therapeutic Recommendations and Considerations

Despite the effectiveness of hydroxyurea, its use requires continuous medical supervision by a specialized team, such as a hematologist, to monitor blood levels and ensure the dosage is appropriate. It is essential to note that hydroxyurea is not safe for use during pregnancy; therefore, women of childbearing age must proactively discuss alternative options or pregnancy planning arrangements with their treating physician [1].

Prevention and Integrated Care

Hydroxyurea does not replace the adoption of a healthy lifestyle; other preventive strategies remain an integral part of disease management, such as maintaining hydration (drinking sufficient amounts of fluids), avoiding extreme temperatures, and adhering to the vaccination schedule to reduce the risk of infection [2]. For more details on long-term care strategies, you can read our article on Sickle Cell Disease: Chronic Pain Management and Crisis Prevention (Arabic).

When Should You Seek Urgent Care?

Sickle cell disease patients using this treatment should not ignore the appearance of emergency symptoms. If a patient experiences severe pain crises that do not respond to usual painkillers, or faces breathing difficulties or sudden neurological symptoms, they must go to the emergency department immediately. Managing this condition requires an integrated medical team, and regular follow-up remains the best guarantee for adjusting treatment and avoiding serious complications [1].

Medical references

• Sickle Cell Disease
• About Sickle Cell Disease