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What should I discuss with my healthcare provider before taking zileuton (Zyflo, Zyflo CR)?
You should not use zileuton if you are allergic to it, or if you have liver disease.
To make sure you can safely take zileuton, tell your doctor if you drink large amounts of alcohol.
FDA pregnancy category C. It is not known whether zileuton will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication.
It is not known whether zileuton passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
Do not give this medicine to a child younger than 12 years old without medical advice.
How should I take zileuton (Zyflo, Zyflo CR)?
Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. 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 it whole. Breaking the pill may 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. Use only a fast acting inhalation medication. Talk with your doctor if any of your asthma medications do not seem to work as well in treating or preventing attacks.
It may take up to a few weeks before your symptoms improve. Keep using the medication as directed even if you feel fine or have no symptoms. Having no asthma symptoms is a sign that the medication is working.
Asthma is often treated with a combination of drugs. Use all medications as directed by your doctor. Read the medication guide or patient instructions provided with each medication. Do not change your doses or medication schedule without your doctor's advice, 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.
You may need regular medical tests to be sure this medication is not causing harmful effects. Visit your doctor regularly.
Store 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.
Need help identifying pills and medications?
Asthma and Allergy Resources
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