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|  | The Anatomical Therapeutic Chemical (ATC) classification system |  | 
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 Level 4
 
 A - Alimentary tract and metabolismA02 - Drugs for acid related disordersA02B - Drugs for peptic ulcer and gastro-oesophageal reflux disease (GORD)A02BB - Prostaglandins
 
 A02BB01 - MisoprostolA02BB02 - Enprostil
 
 
 
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