ATC codes
C Cardiovascular system
C01 Cardiac therapy
C02 Antihypertensives
C03 Diuretics
C04 Peripheral vasodilators
C05 Vasoprotectives
C07 Beta blocking agents
C08 Calcium channel blockers
C09 Agents acting on the renin-angiotensin system
C10 Lipid modifying agents
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ATC code C03 Diuretics is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the WHO for the classification of drugs and other medical products. Subgroup C03 is part of the anatomical group C Cardiovascular system.^[1]

Codes for veterinary use (ATCvet codes) can be created by placing the letter Q in front of the human ATC code: QC03...^[2] ATCvet codes without corresponding human ATC codes are cited with the leading Q in the following list.

Contents 1 C03A Low-ceiling diuretics, thiazides 1.1 C03AA Thiazides, plain 1.2 C03AB Thiazides and potassium in combination 1.3 C03AH Thiazides, combinations with psycholeptics and/or analgesics 1.4 C03AX Thiazides, combinations with other drugs 2 C03B Low-ceiling diuretics, excluding thiazides 2.1 C03BA Sulfonamides, plain 2.2 C03BB Sulfonamides and potassium in combination 2.3 C03BC Mercurial diuretics 2.4 C03BD Xanthine derivatives 2.5 C03BK Sulfonamides, combinations with other drugs 2.6 C03BX Other low-ceiling diuretics 3 C03C High-ceiling diuretics 3.1 C03CA Sulfonamides, plain 3.2 C03CB Sulfonamides and potassium in combination 3.3 C03CC Aryloxyacetic acid derivatives 3.4 C03CD Pyrazolone derivatives 3.5 C03CX Other high-ceiling diuretics 4 C03D Potassium-sparing agents 4.1 C03DA Aldosterone antagonists 4.2 C03DB Other potassium-sparing agents 5 C03E Diuretics and potassium-sparing agents in combination 5.1 C03EA Low-ceiling diuretics and potassium-sparing agents 5.2 C03EB High-ceiling diuretics and potassium-sparing agents 6 C03X Other diuretics 6.1 C03XA Vasopressin antagonists 7 References

[edit] C03A Low-ceiling diuretics, thiazides

[edit] C03AA Thiazides, plain

C03AA01 Bendroflumethiazide

C03AA02 Hydroflumethiazide

C03AA03 Hydrochlorothiazide

C03AA04 Chlorothiazide

C03AA05 Polythiazide

C03AA06 Trichlormethiazide

C03AA07 Cyclopenthiazide

C03AA08 Methyclothiazide

C03AA09 Cyclothiazide

C03AA13 Mebutizide

QC03AA56 Trichlormethiazide, combinations

[edit] C03AB Thiazides and potassium in combination

C03AB01 Bendroflumethiazide and potassium

C03AB02 Hydroflumethiazide and potassium

C03AB03 Hydrochlorothiazide and potassium

C03AB04 Chlorothiazide and potassium

C03AB05 Polythiazide and potassium

C03AB06 Trichlormethiazide and potassium

C03AB07 Cyclopenthiazide and potassium

C03AB08 Methyclothiazide and potassium

C03AB09 Cyclothiazide and potassium

[edit] C03AH Thiazides, combinations with psycholeptics and/or analgesics

C03AH01 Chlorothiazide, combinations

C03AH02 Hydroflumethiazide, combinations

[edit] C03AX Thiazides, combinations with other drugs

C03AX01 Hydrochlorothiazide, combinations

[edit] C03B Low-ceiling diuretics, excluding thiazides

[edit] C03BA Sulfonamides, plain

C03BA02 Quinethazone

C03BA03 Clopamide

C03BA04 Chlortalidone

C03BA05 Mefruside

C03BA07 Clofenamide

C03BA08 Metolazone

C03BA09 Meticrane

C03BA10 Xipamide

C03BA11 Indapamide

C03BA12 Clorexolone

C03BA13 Fenquizone

C03BA82 Clorexolone, combinations with psycholeptics

[edit] C03BB Sulfonamides and potassium in combination

C03BB02 Quinethazone and potassium

C03BB03 Clopamide and potassium

C03BB04 Chlortalidone and potassium

C03BB05 Mefruside and potassium

C03BB07 Clofenamide and potassium

[edit] C03BC Mercurial diuretics

C03BC01 Mersalyl

[edit] C03BD Xanthine derivatives

C03BD01 Theobromine

[edit] C03BK Sulfonamides, combinations with other drugs

[edit] C03BX Other low-ceiling diuretics

C03BX03 Cicletanine

[edit] C03C High-ceiling diuretics

[edit] C03CA Sulfonamides, plain

C03CA01 Furosemide

C03CA02 Bumetanide

C03CA03 Piretanide

C03CA04 Torasemide

[edit] C03CB Sulfonamides and potassium in combination

C03CB01 Furosemide and potassium

C03CB02 Bumetanide and potassium

[edit] C03CC Aryloxyacetic acid derivatives

C03CC01 Etacrynic acid

C03CC02 Tienilic acid

[edit] C03CD Pyrazolone derivatives

C03CD01 Muzolimine

[edit] C03CX Other high-ceiling diuretics

C03CX01 Etozolin

[edit] C03D Potassium-sparing agents

[edit] C03DA Aldosterone antagonists

C03DA01 Spironolactone

C03DA02 Potassium canrenoate

C03DA03 Canrenone

C03DA04 Eplerenone

[edit] C03DB Other potassium-sparing agents

C03DB01 Amiloride

C03DB02 Triamterene

[edit] C03E Diuretics and potassium-sparing agents in combination

[edit] C03EA Low-ceiling diuretics and potassium-sparing agents

C03EA01 Hydrochlorothiazide and potassium-sparing agents

C03EA02 Trichlormethiazide and potassium-sparing agents

C03EA03 Epitizide and potassium-sparing agents

C03EA04 Altizide and potassium-sparing agents

C03EA05 Mebutizide and potassium-sparing agents

C03EA06 Chlortalidone and potassium-sparing agents

C03EA07 Cyclopenthiazide and potassium-sparing agents

C03EA12 Metolazone and potassium-sparing agents

C03EA13 Bendroflumethiazide and potassium-sparing agents

C03EA14 Butizide and potassium-sparing agents

[edit] C03EB High-ceiling diuretics and potassium-sparing agents

C03EB01 Furosemide and potassium-sparing agents

C03EB02 Bumetanide and potassium-sparing agents

[edit] C03X Other diuretics

[edit] C03XA Vasopressin antagonists

C03XA01 Tolvaptan

C03XA02 Conivaptan

[edit] References

v • d • e Antihypertensives: diuretics (C03) Sulfonamides (except EA) CA inhibitors (at PT) Acetazolamide Loop (Na-K-Cl at AL) Furosemide# • Bumetanide • Torasemide • Etacrynic acid Thiazides (Na-Cl at DCT, Calcium-sparing) Hydrochlorothiazide# • Bendroflumethiazide • Hydroflumethiazide • Chlorothiazide • Polythiazide • Trichlormethiazide • Cyclopenthiazide • Methyclothiazide • Cyclothiazide • Mebutizide Thiazide-likes (primarily DCT) Quinethazone • Clopamide • Chlortalidone • Mefruside • Clofenamide • Metolazone • Meticrane • Xipamide • Indapamide • Clorexolone • Fenquizone Potassium-sparing (at CD) ESC blockers Amiloride# • Triamterene • Benzamil Aldosterone antagonists Spironolactone# • Eplerenone • Potassium canrenoate • Canrenone Osmotic diuretics (PT, DL) Mannitol# • Urea VAs (DCT and CD) vaptans: Conivaptan • Mozavaptan • Satavaptan • Tolvaptan tetracyclines: Demeclocycline Other mercurial diuretic (Mersalyl) • Theobromine • Cicletanine #WHO-EM. ‡Withdrawn from market. CLINICAL TRIALS: †Phase III. §Never to phase III