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|  | The Anatomical Therapeutic Chemical (ATC) classification system |  | 
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 Level 5
 
 J - Antiinfectives for systemic useJ05 - Antivirals for systemic useJ05A - Direct acting antiviralsJ05AB - Nucleosides and nucleotides excluding reverse transcriptase inhibitorsJ05AB09 - Famciclovir
 
 Famciclovir
 
 
 
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