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|  | The Anatomical Therapeutic Chemical (ATC) classification system |  | 
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 Level 3
 
 A - Alimentary tract and metabolismA05 - Bile and liver therapyA05A - Bile therapy
 
 A05AA - Bile acid preparationsA05AB - Preparations for biliary tract therapyA05AX - Other drugs for bile therapy
 
 
 
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