ATC code C03
{{ATC codes lead|C|03|Diuretics|vet=add}}
{{anchor|C03A}}C03A [[Low-ceiling diuretic]]s, thiazides
={{anchor|C03AA}}C03AA [[Thiazide]]s, plain=
:C03AA01 Bendroflumethiazide
:C03AA02 Hydroflumethiazide
:C03AA03 Hydrochlorothiazide
:C03AA04 Chlorothiazide
:C03AA05 Polythiazide
:C03AA06 Trichlormethiazide
:C03AA07 Cyclopenthiazide
:C03AA08 Methyclothiazide
:C03AA09 Cyclothiazide
:C03AA13 Mebutizide
:QC03AA56 Trichlormethiazide, combinations
={{anchor|C03AB}}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
={{anchor|C03AH}}C03AH Thiazides, combinations with psycholeptics and/or [[analgesic]]s=
:C03AH01 Chlorothiazide, combinations
:C03AH02 Hydroflumethiazide, combinations
={{anchor|C03AX}}C03AX Thiazides, combinations with other drugs=
:C03AX01 Hydrochlorothiazide, combinations
{{anchor|C03B}}C03B Low-ceiling diuretics, excluding thiazides
={{anchor|C03BA}}C03BA [[Sulfonamide (medicine)|Sulfonamide]]s, 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
={{anchor|C03BB}}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
={{anchor|C03BC}}C03BC [[Mercurial diuretic]]s=
:C03BC01 Mersalyl
={{anchor|C03BD}}C03BD [[Xanthine]] derivatives=
:C03BD01 Theobromine
={{anchor|C03BK}}C03BK Sulfonamides, combinations with other drugs=
={{anchor|C03BX}}C03BX Other low-ceiling diuretics=
:C03BX03 Cicletanine
{{anchor|C03C}}C03C [[High-ceiling diuretic]]s
={{anchor|C03CA}}C03CA Sulfonamides, plain=
={{anchor|C03CB}}C03CB Sulfonamides and potassium in combination=
:C03CB01 Furosemide and potassium
:C03CB02 Bumetanide and potassium
={{anchor|C03CC}}C03CC [[Aryloxyacetic acid]] derivatives=
:C03CC01 Etacrynic acid
:C03CC02 Tienilic acid
={{anchor|C03CD}}C03CD [[Pyrazolone]] derivatives=
:C03CD01 Muzolimine
={{anchor|C03CX}}C03CX Other high-ceiling diuretics=
:C03CX01 Etozolin
{{anchor|C03D}}C03D [[Aldosterone antagonist]]s and other [[potassium-sparing agent]]s
={{anchor|C03DA}}C03DA Aldosterone antagonists=
:C03DA01 Spironolactone
:C03DA02 Potassium canrenoate
:C03DA03 Canrenone
:C03DA04 Eplerenone
:C03DA05 Finerenone
={{anchor|C03DB}}C03DB Other potassium-sparing agents=
:C03DB01 Amiloride
:C03DB02 Triamterene
{{anchor|C03E}}C03E Diuretics and potassium-sparing agents in combination
={{anchor|C03EA}}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
={{anchor|C03EB}}C03EB High-ceiling diuretics and potassium-sparing agents=
:C03EB01 Furosemide and potassium-sparing agents
:C03EB02 Bumetanide and potassium-sparing agents
{{anchor|C03X}}C03X Other diuretics
={{anchor|C03XA}}C03XA [[Vasopressin receptor antagonist|Vasopressin antagonist]]s=
:C03XA01 Tolvaptan
:C03XA02 Conivaptan