Anatomical Therapeutic Chemical Classification System: Wikis

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Encyclopedia

The Anatomical Therapeutic Chemical (ATC) Classification System is used for the classification of drugs. It is controlled by the WHO Collaborating Centre for Drug Statistics Methodology, and was first published in 1976.^[1]

The classification system divides drugs into different groups according to the organ or system on which they act and/or their therapeutic and chemical characteristics.

1 Classification
2 ATCvet
3 References
4 External links

Classification

In this system, drugs are classified into groups at 5 different levels:^[1]

First level

The first level of the code indicates the anatomical main group and consists of one letter. There are 14 main groups:^[2]

Code	Contents
A	Alimentary tract and metabolism
B	Blood and blood forming organs
C	Cardiovascular system
D	Dermatologicals
G	Genito-urinary system and sex hormones
H	Systemic hormonal preparations, excluding sex hormones and insulins
J	Antiinfectives for systemic use
L	Antineoplastic and immunomodulating agents
M	Musculo-skeletal system
N	Nervous system
P	Antiparasitic products, insecticides and repellents
R	Respiratory system
S	Sensory organs
V	Various

Second level

The second level of the code indicates the therapeutic main group and consists of two digits.

Example: C03 Diuretics

Third level

The third level of the code indicates the therapeutic/pharmacological subgroup and consists of one letter.

Example: C03C High-ceiling diuretics

Fourth level

The fourth level of the code indicates the chemical/therapeutic/pharmacological subgroup and consists of one letter.

Example: C03CA Sulfonamides

Fifth level

The fifth level of the code indicates the chemical substance and consists of two digits.

Example: C03CA01 Furosemide

ATCvet

The Anatomical Therapeutic Chemical Classification System for veterinary medicinal products (ATCvet) is used to classify veterinary drugs. ATCvet codes can be created by placing the letter Q in front of the ATC code of most human medications. For example, furosemide for veterinary use has the code QC03CA01.

Some codes are used exclusively for veterinary drugs, like QI Immunologicals, QJ51 Antibacterials for intramammary use or QN05AX90 amperozide.^[3]

References

External links

Official ATC website, hosted by the WHO Collaborating Centre for Drug Statistics Methodology
ATC

[[Template:FULLPAGENAME: Major drug groups\|v]] • [[{{TALKPAGENAME:Template:FULLPAGENAME: Major drug groups}}\|d]] • [{{fullurl:Template:FULLPAGENAME: Major drug groups\|action=edit}}e] Major drug groups

Gastrointestinal tract/metabolism (A)	stomach acid (Antacids, H₂ antagonists, Proton pump inhibitors)Template:• AntiemeticsTemplate:• LaxativesTemplate:• Antidiarrhoeals/AntipropulsivesTemplate:• Anti-obesity drugsTemplate:• Anti-diabeticsTemplate:• VitaminsTemplate:• Dietary minerals

Blood and blood forming organs (B)	Antithrombotics (Antiplatelets, Anticoagulants, Thrombolytics/fibrinolytics)Template:• Antihemorrhagics (Platelets, Coagulants, Antifibrinolytics)

Cardiovascular system (C)	cardiac therapy/antianginals (Cardiac glycosides, Antiarrhythmics, Cardiac stimulants) AntihypertensivesTemplate:• DiureticsTemplate:• VasodilatorsTemplate:• Beta blockersTemplate:• Calcium channel blockersTemplate:• renin-angiotensin system (ACE inhibitors, Angiotensin II receptor antagonists, Renin inhibitors) Antihyperlipidemics (Statins, Fibrates, Bile acid sequestrants)

Skin (D)	EmollientsTemplate:• CicatrizantsTemplate:• AntipruriticsTemplate:• AntipsoriaticsTemplate:• Medicated dressings

Reproductive system (G)	Hormonal contraceptionTemplate:• Fertility agentsTemplate:• SERMsTemplate:• Sex hormones

Endocrine system (H)	Hypothalamic-pituitary hormonesTemplate:• Corticosteroids (Glucocorticoids, Mineralocorticoids)Template:• Sex hormonesTemplate:• Thyroid hormones/Antithyroid agents

Infections and infestations (J, P, QI)	AntibioticsTemplate:• Antimycobacterials (Tuberculosis treatment, Leprostatic agents)Template:• AntifungalsTemplate:•AntiviralsTemplate:• VaccinesTemplate:• Antiparasitics (Antiprotozoals, Anthelmintics)Template:• Ectoparasiticides

Malignant disease (L01-L02)	Anticancer agents (Antimetabolites, Alkylating, Spindle poisons, Antineoplastic, Topoisomerase inhibitors)

Immune disease (L03-L04)	Immunomodulators (Immunostimulants, Immunosuppressants)

Muscles, bones, and joints (M)	Anabolic steroidsTemplate:• Anti-inflammatories (NSAIDs)Template:• AntirheumaticsTemplate:• CorticosteroidsTemplate:• Muscle relaxantsTemplate:• Bisphosphonates

Brain and nervous system (N)	Anesthetics (General, Local)Template:• AnalgesicsTemplate:• AntimigrainesTemplate:• Anticonvulsants/Mood stabilizers (Lithium pharmacology)Template:• Antiparkinson drugs Psycholeptics (Anxiolytics, Antipsychotics, Hypnotics/Sedatives)Template:• Psychoanaleptics (Antidepressants, Stimulants)

Respiratory system (R)	DecongestantsTemplate:• BronchodilatorsTemplate:• Cough medicinesTemplate:• H₁ antagonists

Sensory organs (S)	OphthalmologicalsTemplate:• Otologicals

Other ATC (V)	AntidotesTemplate:• Contrast mediaTemplate:• RadiopharmaceuticalsTemplate:• Dressings

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