| ATC code A: Alimentary tract and metabolism |
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| Other ATC codes |
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ATC code A Alimentary tract and metabolism is a section of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products.[1][2][3][4]
Codes for veterinary use (ATCvet codes) can be created by placing the letter Q in front of the human ATC code: for example, QA.[5]
National issues of the ATC classification may include additional codes not present in this list, which follows the WHO version.
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Major chemical drug groups – based upon the Anatomical Therapeutic Chemical Classification System
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| gastrointestinal tract / metabolism (A) |
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| blood and blood forming organs (B) |
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| cardiovascular system (C) |
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| skin (D) |
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| genitourinary system (G) |
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| endocrine system (H) |
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| infections and infestations (J, P, QI) |
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| malignant disease (L01–L02) |
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| immune disease (L03–L04) |
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| muscles, bones, and joints (M) |
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| brain and nervous system (N) |
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| respiratory system (R) |
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| sensory organs (S) |
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| other ATC (V) |
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| Magnesium (increases motility) |
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| Aluminium (decreases motility) |
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| Calcium |
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| Sodium |
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| Combinations and complexes of aluminium, calcium and magnesium |
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| H2 antagonists ("-tidine") |
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| Prostaglandins (E)/ analogues ("-prost-") |
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| Proton-pump inhibitors ("-prazole") |
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| Potassium-competitive acid blockers ("-prazan") |
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| Others |
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| Combinations |
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Drugs for functional gastrointestinal disorders (A03)
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| Drugs for functional bowel disorders |
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| Belladonna and derivatives (antimuscarinics) |
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| Propulsives |
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| Stool softeners |
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| Stimulant laxatives |
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| Bulk-forming laxatives |
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| Lubricant laxatives |
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| Osmotic laxatives |
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| Enemas |
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| Opioid antagonists |
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| Others |
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| Rehydration |
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| Intestinal anti-infectives |
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| Intestinal adsorbents |
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| Antipropulsives (opioids) |
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| Intestinal anti-inflammatory agents |
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| Antidiarrheal micro-organisms |
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| Other antidiarrheals |
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| Fat soluble |
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| Water soluble |
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| Combinations |
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| Major |
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| Trace |
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| Ultratrace |
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| Androgens (incl. AASTooltip anabolic–androgenic steroid) |
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| Antiandrogens |
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| Amino acids and derivatives |
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| Enzymes |
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| Other |
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