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zileuton A synthetic derivative of hydroxyurea with antiasthmatic properties. The leukotriene inhibitor zileuton blocks 5-lipoxygenase, which catalyzes the formation of leukotrienes from arachidonic acid; causes bronchodilation; decreases bronchial mucous secretion and edema; and may prevent or decrease the symptoms of asthma. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
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US brand name: | ![](https://webarchive.library.unt.edu/eot2008/20090509222813im_/http://www.cancer.gov/images/spacer.gif) | Zyflo | | ![](https://webarchive.library.unt.edu/eot2008/20090509222813im_/http://www.cancer.gov/images/spacer.gif) | Abbreviation: | ![](https://webarchive.library.unt.edu/eot2008/20090509222813im_/http://www.cancer.gov/images/spacer.gif) | ZLT | | ![](https://webarchive.library.unt.edu/eot2008/20090509222813im_/http://www.cancer.gov/images/spacer.gif) | Chemical structure names: | ![](https://webarchive.library.unt.edu/eot2008/20090509222813im_/http://www.cancer.gov/images/spacer.gif) | - (+-)-N-Hydroxy-N-(1-benzo[b]thien-2-ylethyl)-urea
- N-(1-Benzo[b]thien-2-ylethyl)-N-hydroxyurea
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