Hydroxyurea is used to treat skin cancer (melanoma), a cancer of the white blood cells called chronic myelocytic leukemia (CML), and metastatic cancer (cancer that has spread) of the ovaries. This medicine may also be given together with radiation treatment for head and neck cancer (primary squamous cell cancer).
Hydroxyurea is also used in adult patients with sickle cell anemia to prevent painful episodes and reduce the need for blood transfusions. It works by making the red blood cells more flexible.
Before you begin treatment with hydroxyurea, you and your doctor should talk about the good this medicine will do as well as the risks of using it.
Take this medicine exactly as directed by your doctor. Do not use more of it, do not use it more often, and do not use it for a longer time than your doctor ordered.
This medicine comes with a patient information insert. Read and follow the instructions in the insert carefully. Ask your doctor if you have any questions.
Hydroxyurea should be handled with care and people who are not taking this medicine should be careful to avoid touching it. To decrease the chance of touching the medicine:
Wear disposable gloves when handling hydroxyurea or bottles containing hydroxyurea.
Wash your hands before and after contact with the bottle or capsules.
If powder from the capsule is spilled, you should wipe it up immediately with a damp disposable towel and discard it in a closed container, such as a plastic bag.
You should keep medicine away from children and pets.
You should contact your doctor for instructions on how to dispose of capsules that are past the expiration date.
If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
For oral dosage form (capsules):
For cancer of the head and neck, ovaries, or skin:
For chronic myelocytic leukemia (CML):
For sickle cell anemia:
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Ask your healthcare professional how you should dispose of any medicine you do not use.
It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly. Blood tests may be needed to check for unwanted effects.
Make sure your doctor knows if you are pregnant before you use this medicine. Using this medicine while you are pregnant can harm your unborn baby. If you think you have become pregnant while using the medicine, tell your doctor right away.
While you are being treated with hydroxyurea, and after you stop using it, do not have any immunizations (vaccines) without your doctor's approval. Hydroxyurea may lower your body's resistance and there is a chance you might get the infection the vaccine is meant to prevent. In addition, other persons living in your household should not get live vaccines (eg, nasal flu vaccine, measles, mumps, or rubella) since there is a chance they could pass the infection on to you. Also, avoid persons who have had a live vaccine. Do not get close to them and do not stay in the same room with them for very long. If you cannot take these precautions, you should consider wearing a protective face mask that covers the nose and mouth.
Hydroxyurea can temporarily lower the number of white blood cells in your blood, increasing the chance of getting an infection. It can also lower the number of platelets, which are necessary for proper blood clotting. If this occurs, there are certain precautions you can take, especially when your blood count is low, to reduce the risk of infection or bleeding:
Using this medicine for a long time may increase your risk of developing cancer of the blood (leukemia). Talk to your doctor if you have concerns about this risk.
This medicine may cause temporary loss of hair in some people. After treatment has ended, normal hair growth should return, although the new hair may be a slightly different color or texture.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Incidence not known
Get emergency help immediately if any of the following symptoms of overdose occur:
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects.