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What should I discuss with my healthcare provider before taking zileuton (Zyflo CR)?
Do not use this medication if you are allergic to zileuton, or if you have liver disease.
If you drink large amounts of alcohol or have a history of liver disease, you may need a dose adjustment or special tests to safely take zileuton
FDA pregnancy category C. It is not known whether zileuton is harmful to an unborn baby. Before taking this medication, tell your doctor if you are pregnant or plan to become pregnant during treatment.
It is not known whether zileuton passes into breast milk or if it could harm a nursing baby. . Do not take zileuton without telling your doctor if you are breast-feeding a baby.
Do not give this medication to a child without a doctor's advice.
How should I take zileuton (Zyflo CR)?
Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label.
Take zileuton with a full glass of water.
Zileuton tablets and extended-release tablets contain the same amount of the drug, but they are not taken in the same way. Follow your doctor's instructions.
Zileuton tablets are usually taken 4 times daily, with meals and at bedtime. Zileuton tablets may be swallowed whole or split in half to make swallowing easier.
Zileuton extended-release tablets are usually taken twice daily, within 1 hour after your morning and evening meals.
Do not crush, chew, or break an extended-release tablet. Swallow the pill whole. It is specially made to release medicine slowly in the body. Breaking the pill would cause too much of the drug to be released at one time.
Do not use zileuton to treat an asthma attack that has already begun. It will not work fast enough to reverse your symptoms. Use only a fast-acting inhalation medication to treat an asthma attack. Talk with your doctor if any of your asthma medications do not seem to work as well in treating or preventing asthma attacks.
It may take up to a few weeks of using this medicine before your symptoms improve. For best results, keep using zileuton as directed, even if you feel fine. Having no asthma symptoms is a sign that the medication is working.
Asthma is often treated with a combination of different drugs. To best treat your condition, use all of your medications as directed by your doctor. Be sure to read the medication guide or patient instructions provided with each of your medications. Do not change your doses or medication schedule without advice from your doctor, even if you have no asthma symptoms.
Call your doctor right away if you feel that this medicine is not working as well as usual, or if it makes your condition worse. If it seems like you need to use more of any of your medications in a 24-hour period, talk with your doctor.
To be sure this medication is not causing harmful effects, your blood will need to be tested on a regular basis. Your kidney or liver function may also need to be tested. Do not miss any scheduled visits to your doctor.
Store zileuton at room temperature away from moisture and heat.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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