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|  | The Anatomical Therapeutic Chemical (ATC) classification system |  | 
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 Level 5
 
 A - Alimentary tract and metabolismA03 - Drugs for functional gastrointestinal disordersA03A - Drugs for functional bowel disordersA03AX - Other drugs for functional bowel disordersA03AX10 - Isometheptene
 
 Isometheptene
 
 
 
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