Zileuton (By mouth)
Anti-Inflammatory (About this – PubMed Health)
Uses of This Medicine
Zileuton is used by patients with mild-to-moderate chronic asthma to decrease the symptoms of asthma and the number of acute asthma attacks. However, this medicine should not be taken to relieve an asthma attack that has already started.
This medicine is available only with your doctor’s prescription.
Zileuton immediate-release tablets (Zyflo(R)) were withdrawn from the U. S. market by Critical Therapeutics on February 12, 2008. The extended-release formulation of zileuton (Zyflo CR(R)), also manufactured by Critical Therapeutics, Inc, is still available.
Other uses (PubMed Health)
How To Use
Long Acting Tablet, Tablet
Your doctor will tell you how much medicine to use. Do not use more than directed.
Keep using any other asthma medicines your doctor may have prescribed for you. You should not use less or stop using your other medicines unless your doctor has told you to.
To control your asthma, you will need to use this medicine every day as ordered. It may take a few days or weeks before the medicine works. Keep using the medicine as your doctor ordered.
Take the extended-release tablet within one hour after your morning and evening meals.
Swallow the extended-release tablet whole. Do not crush, break, or chew it.
If a dose is missed:
Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.
How to Store and Dispose of This Medicine:
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.
Keep all medicine out of the reach of children. Never share your medicine with anyone.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Make sure your doctor knows if you are using theophylline (Theo-Dur®), a blood thinner (warfarin, Coumadin®), terfenadine (Seldane®, Seldane-D®), or blood pressure medicines, such as propranolol (Inderal®), metoprolol (Lopressor®), atenolol (Tenormin®), or nadolol (Corgard®).
When Not To Use
You should not use this medicine if you have had an allergic reaction to zileuton, or if you have liver disease.
This medicine helps prevent asthma attacks. For the medicine to work, you will need to use it every day, even when you are not having problems with your asthma. If your asthma does not get better or if it gets worse while you are using this medicine, tell your doctor.
Zileuton will not stop a severe asthma attack after it has started. Your doctor may give you a medicine to inhale that will work quickly for a severe attack. If you are already using an inhaler medicine and start to need that medicine more often or use the maximum number of puffs allowed in a day, tell your doctor.
Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
Call your doctor right away if you have pain in the right upper part of your stomach, yellowing of the skin or the whites of the eyes, itching, or if you feel unusually tired or like you have the flu. These may be signs of liver problems.
This medicine may cause some people to be agitated, irritable, or display other abnormal behaviors. It may also cause some people to have suicidal thoughts and tendencies or to become more depressed and have problems with sleep. If you or your caregiver notice any of these side effects, tell your doctor right away.
Possible side effects
Summary More details
Call your doctor right away if you notice any of these side effects:
Dark-colored urine or pale stools.
Increased wheezing or trouble with breathing.
Restlessness, anxiety, feeling irritable, mood or behavior changes, or thoughts of hurting yourself or others.
Tightness in the chest.
Unusual dreams or trouble with sleeping.
Unusual tiredness or weakness.
Yellowing of your skin or the whites of your eyes.
If you notice these less serious side effects, talk with your doctor:
Indigestion, upset stomach, or diarrhea.
If you notice other side effects that you think are caused by this medicine, tell your doctor.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
More side effects of this drug
Brand names include
Zyflo, Zyflo CR
There may be other brand names for this medicine.