The health effects of taking hydroxyurea tablets daily include bone marrow suppression, gastrointestinal reactions, testicular atrophy, causing malformations, and hair loss. Hydroxyurea tablets are a commonly used chemotherapy drug, commonly used in the treatment of chronic granulocytic leukemia and melanoma. The most important adverse reaction of taking this drug for a long period of time is bone marrow suppression, which can lead to a decrease in white blood cells and platelets; sometimes gastrointestinal symptoms, such as nausea, vomiting, etc.; this drug can also lead to testicular atrophy, alopecia, impairment of liver and kidney function, and the risk of teratogenesis. In addition, this drug is contraindicated in people with chickenpox, shingles and various serious infections, pregnant and lactating women. This drug is a prescription drug, if you need to take hydroxyurea tablets every day, you should use the drug under the guidance of a doctor, do not use blindly, and you should regularly monitor the blood routine, liver and kidney function, in the event of an adverse reaction, you should stop taking the drug and seek medical attention in a timely manner.