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aminolevulinic acid![Patient Information Patient Information](https://webarchive.library.unt.edu/eot2008/20081007112113im_/http://www.cancer.gov/images/btn-patient-info.gif) A topically administered metabolic precursor of protoporphyrin IX. After topical administration, aminolevulinic acid (ALA) is converted to protoporphyrin IX (PpIX) which is a photosensitizer. When the proper wavelength of light activates protoporphyrin IX, singlet oxygen is produced, resulting in a local cytotoxic effect. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
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Synonyms: | ![](https://webarchive.library.unt.edu/eot2008/20081007112113im_/http://www.cancer.gov/images/spacer.gif) | 5-Aminolaevulinic Acid 5-Aminolevulinic Acid Amino-Levulinic Acid Delta Aminolevulinic Acid | | ![](https://webarchive.library.unt.edu/eot2008/20081007112113im_/http://www.cancer.gov/images/spacer.gif) | US brand name: | ![](https://webarchive.library.unt.edu/eot2008/20081007112113im_/http://www.cancer.gov/images/spacer.gif) | Levulan | | ![](https://webarchive.library.unt.edu/eot2008/20081007112113im_/http://www.cancer.gov/images/spacer.gif) | Abbreviations: | ![](https://webarchive.library.unt.edu/eot2008/20081007112113im_/http://www.cancer.gov/images/spacer.gif) | 5-ALA ALA | | ![](https://webarchive.library.unt.edu/eot2008/20081007112113im_/http://www.cancer.gov/images/spacer.gif) | Chemical structure names: | ![](https://webarchive.library.unt.edu/eot2008/20081007112113im_/http://www.cancer.gov/images/spacer.gif) | - 5-Amino-4-oxopentanoic Acid
- d-Amino-Levulinic Acid
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