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anastrozole![Patient Information Patient Information](https://webarchive.library.unt.edu/eot2008/20090509152047im_/http://www.cancer.gov/images/btn-patient-info.gif) A nonsteroidal inhibitor of estrogen synthesis that resembles paclitaxel in chemical structure. As a third-generation aromatase inhibitor, anastrozole selectively binds to and reversibly inhibits aromatase, a cytochrome P-450 enzyme complex found in many tissues including those of the premenopausal ovary, liver, and breast; aromatase catalyzes the aromatization of androstenedione and testosterone into estrone and estradiol, the final step in estrogen biosynthesis. In estrogen-dependent breast cancers, anastrozole may inhibit tumor growth. 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/eot2008/20090509152047im_/http://www.cancer.gov/images/spacer.gif) | Arimidex | | ![](https://webarchive.library.unt.edu/eot2008/20090509152047im_/http://www.cancer.gov/images/spacer.gif) | Abbreviation: | ![](https://webarchive.library.unt.edu/eot2008/20090509152047im_/http://www.cancer.gov/images/spacer.gif) | ANAS | | ![](https://webarchive.library.unt.edu/eot2008/20090509152047im_/http://www.cancer.gov/images/spacer.gif) | Code names: | ![](https://webarchive.library.unt.edu/eot2008/20090509152047im_/http://www.cancer.gov/images/spacer.gif) | ICI-D1033 ZD-1033 | | ![](https://webarchive.library.unt.edu/eot2008/20090509152047im_/http://www.cancer.gov/images/spacer.gif) | Chemical structure names: | ![](https://webarchive.library.unt.edu/eot2008/20090509152047im_/http://www.cancer.gov/images/spacer.gif) | - 2,2'-[5-(1H-1,2,4-triazol-1-ylmethyl)-1,3-phenylene]di(2-methylpropionitrile)
- alpha,alpha,alpha', alpha'-tetramethyl-5-(1H-1,2,4-triazol-1-ylmethyl)-1,3-benzenediacetonitrile
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