Why your doctor prescribed ZYFLO CR®
Your doctor may have prescribed ZYFLO CR® because it works differently than other medications you may have tried to help you gain control of your asthma symptoms.
ZYFLO CR® is designed to prevent substances called leukotrienes (loo-ko-TRY-enz) from being made by your body. Only zileuton, the active ingredient in ZYFLO CR®, helps stop the production of the leukotrienes that may contribute to the swelling and inflammation that cause asthma symptoms.
ZYFLO CR® has been shown to improve your ability to breathe in and out (your lung function) and may reduce your need for a rescue inhaler for sudden symptoms.