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hydroxyurea A monohydroxyl-substituted urea (hydroxycarbamate) antimetabolite. Hydroxyurea selectively inhibits ribonucleoside diphosphate reductase, an enzyme required to convert ribonucleoside diphosphates into deoxyribonucleoside diphosphates, thereby preventing cells from leaving the G1/S phase of the cell cycle. This agent also exhibits radiosensitizing activity by maintaining cells in the radiation-sensitive G1 phase and interfering with DNA repair. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
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Synonyms: | ![](https://webarchive.library.unt.edu/eot2008/20090509170014im_/http://www.cancer.gov/images/spacer.gif) | HYD Hydroxycarbamide Hydurea | | ![](https://webarchive.library.unt.edu/eot2008/20090509170014im_/http://www.cancer.gov/images/spacer.gif) | US brand names: | ![](https://webarchive.library.unt.edu/eot2008/20090509170014im_/http://www.cancer.gov/images/spacer.gif) | Droxia Hydrea | | ![](https://webarchive.library.unt.edu/eot2008/20090509170014im_/http://www.cancer.gov/images/spacer.gif) | Foreign brand names: | ![](https://webarchive.library.unt.edu/eot2008/20090509170014im_/http://www.cancer.gov/images/spacer.gif) | Litalir Onco-Carbide Oxeron Syrea | | ![](https://webarchive.library.unt.edu/eot2008/20090509170014im_/http://www.cancer.gov/images/spacer.gif) | Abbreviation: | ![](https://webarchive.library.unt.edu/eot2008/20090509170014im_/http://www.cancer.gov/images/spacer.gif) | HU | | ![](https://webarchive.library.unt.edu/eot2008/20090509170014im_/http://www.cancer.gov/images/spacer.gif) | Code names: | ![](https://webarchive.library.unt.edu/eot2008/20090509170014im_/http://www.cancer.gov/images/spacer.gif) | SQ-1089 WR 83799 | | ![](https://webarchive.library.unt.edu/eot2008/20090509170014im_/http://www.cancer.gov/images/spacer.gif) |
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