Hydroxyurea is a well-established medication that has been around for decades, but many people still have questions about what it does, how it works, and who should take it. Whether you’ve heard of Hydroxyurea 500 mg in relation to cancer treatment, or you’re exploring it as a therapy for sickle cell disease, this guide will break down everything in plain English.
We’ll cover what hydroxyurea is used for, whether it’s chemotherapy, how it helps with sickle cells, side effects, what to avoid, dosage, and more. By the end, you’ll have a clear picture of this important drug and where you can source it in bulk from trusted suppliers.
What Is Hydroxyurea?
Hydroxyurea is an oral medication that falls under the class of antimetabolites—drugs that interfere with the way cells grow and divide. It works by inhibiting an enzyme called ribonucleotide reductase, which is essential for DNA synthesis.
Because of this mechanism, hydroxyurea slows down or stops the growth of rapidly dividing cells. This is why it’s often used in cancer treatment and blood disorders.
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What Is Hydroxyurea Used For?
Doctors prescribe hydroxyurea for several serious conditions. Its main indications include:
- Sickle Cell Disease
Hydroxyurea is one of the few proven disease-modifying treatments for sickle cell anemia. It increases the production of fetal hemoglobin (HbF), which helps prevent red blood cells from “sickling” and reduces painful crises. - Certain Cancers (Chemotherapy Use)
Hydroxyurea has long been used as a type of chemotherapy drug. It is especially useful in chronic myeloid leukemia (CML), head and neck cancers, and ovarian cancer. - Myeloproliferative Disorders
Conditions like polycythemia vera and essential thrombocythemia, where the body produces too many blood cells, are often managed with hydroxyurea to lower counts and reduce clot risks. - Other Off-Label Uses
Research continues into its potential in HIV treatment, psoriasis, and other immune-related conditions, although these are less common.
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Is Hydroxyurea Considered Chemotherapy?
Yes, hydroxyurea is considered chemotherapy, but it doesn’t always look like the “traditional” chemo drugs people think of.
Unlike IV chemotherapy that is given in cycles, hydroxyurea is usually taken daily by mouth in capsule or tablet form (commonly Hydroxyurea 500 mg tablets). While it is less aggressive than some cancer drugs, it still affects bone marrow and can suppress blood counts, so careful monitoring is needed.

How Does Hydroxyurea Help in Sickle Cell Disease?
For people with sickle cell anemia, hydroxyurea is a game-changer. Here’s how it works:
- Boosts fetal hemoglobin (HbF): HbF doesn’t sickle, so higher levels mean fewer blocked blood vessels.
- Reduces pain crises: Patients often report fewer hospital visits for painful episodes.
- Decreases transfusion needs: With better red cell stability, blood transfusions become less frequent.
- Improves quality of life: Less fatigue, fewer complications, and longer survival rates have all been documented.
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Hydroxyurea Dosage and Administration
- Typical starting dose: For sickle cell disease, doctors often start at 15 mg/kg/day.
- Adjustments: The dose may be increased gradually depending on blood counts and response.
- Common strength: Hydroxyurea 500 mg tablets are the most widely used form.
- Monitoring: Regular blood tests are crucial to track white blood cells, platelets, and hemoglobin levels.
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Hydroxyurea Side Effects
Like any strong medication, hydroxyurea has side effects. Some are mild and manageable, while others can be more serious.

Common Side Effects:
- Fatigue or weakness (Hydroxyurea fatigue)
- Nausea and mild stomach upset
- Mouth sores
- Darkening of nails or skin
Serious Side Effects:
- Bone marrow suppression (low white blood cells, anemia, or low platelets)
- Increased risk of infection
- Rarely, long-term use may be linked to secondary cancers
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What Should I Avoid While Taking Hydroxyurea?
Patients often ask: “What foods to avoid when taking hydroxyurea?” While there aren’t strict food restrictions, here are some general guidelines:
- Avoid alcohol: It can increase liver stress and fatigue.
- Limit high-risk foods: Raw seafood or undercooked meats should be avoided due to infection risk from lowered immunity.
- Stay away from unregulated herbal supplements: Some herbs can interact with drug metabolism.
- Avoid live vaccines: If your immunity is suppressed, vaccines like yellow fever or live flu vaccine should be avoided.
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FAQ: Hydroxyurea at a Glance
1. What is hydroxyurea used for?
It’s used for sickle cell anemia, certain cancers, and blood disorders like polycythemia vera.
2. Is hydroxyurea chemotherapy?
Yes, it is considered an oral chemotherapy drug.
3. How does hydroxyurea work?
It blocks DNA synthesis and increases fetal hemoglobin in sickle cell patients.
4. What are common side effects?
Fatigue, nausea, mouth sores, and low blood counts.
5. Can I drink alcohol with hydroxyurea?
It’s best to limit or avoid alcohol.
6. Is hydroxyurea safe long term?
Many patients take it for years under medical supervision, but regular monitoring is essential.
7. Where can I buy hydroxyurea in bulk?
Trusted suppliers like Shaanxi Zhonghong Investment Technology Co., Ltd. offer hydroxyurea for international buyers. Visit aiherba.com or contact them at sales@aiherba.com, info@aiherba.com, liaodaohai@gmail.com.
Where to Buy Hydroxyurea in Bulk
If you’re a pharmaceutical manufacturer, wholesaler, or healthcare supplier, sourcing from a reliable partner is critical.
Shaanxi Zhonghong Investment Technology Co., Ltd. is a professional supplier of hydroxyurea and other active pharmaceutical ingredients (APIs). With strict quality control and international shipping, they provide Hydroxyurea 500 mg and customized bulk solutions.
Website: aiherba.com
Email: sales@aiherba.com | info@aiherba.com | liaodaohai@gmail.com
Summary
Hydroxyurea is more than just another pill—it’s a lifesaving medication for people with sickle cell disease and a powerful tool in cancer treatment.
- It is considered oral chemotherapy, commonly prescribed as Hydroxyurea 500 mg tablets.
- It works by blocking DNA production and increasing fetal hemoglobin.
- Patients should be aware of side effects and avoid certain foods and habits.
- Long-term use can be safe with proper medical monitoring.
- Bulk supply is available from Shaanxi Zhonghong Investment Technology Co., Ltd. for international buyers.
References
- National Institutes of Health (NIH) – Hydroxyurea Information
- U.S. Food & Drug Administration (FDA) – Hydroxyurea Prescribing Information
- American Society of Hematology – Hydroxyurea in Sickle Cell Disease
- Mayo Clinic – Hydroxyurea (Oral Route) Description
