Diuretic brand and generic names
These examples introduce the major groups without attempting to list every diuretic. Combination products appear separately because each ingredient needs its own place in your answer.
Loop diuretics
| Brand name | Generic name | Class or type |
|---|---|---|
| Lasix | furosemide | Loop diuretics |
| Demadex | torsemide | Loop diuretics |
Thiazide and thiazide-like diuretics
| Brand name | Generic name | Class or type |
|---|---|---|
| Microzide | hydrochlorothiazide | Thiazide diuretics |
| Thalitone | chlorthalidone | Thiazide-like diuretics |
Potassium-sparing example
| Brand name | Generic name | Class or type |
|---|---|---|
| Aldactone | spironolactone | Potassium-sparing diuretics |
Combination examples
| Brand name | Generic name | Class or type |
|---|---|---|
| Dyazide | hydrochlorothiazide, triamterene | Thiazide / potassium-sparing diuretics |
| Hyzaar | hydrochlorothiazide, losartan | ARB / thiazide |
Understanding diuretic types
Diuretics affect salt and water handling by the kidneys, but they do not all act in the same place or have the same properties. The group names provide a useful framework before you learn further pharmacology.
Furosemide and torsemide are loop diuretics. Hydrochlorothiazide is a thiazide, while chlorthalidone is commonly described as thiazide-like. That distinction is worth retaining even when a broader study table places the last two together.
Spironolactone and triamterene are potassium-sparing diuretics, but that shared label does not mean their mechanisms are identical. Spironolactone is an aldosterone antagonist. Triamterene belongs to a different potassium-sparing group. Learn the broad category first and add mechanism details as a separate layer.
Naming patterns and memory tips
There is no single dependable ending for all diuretics. The names furosemide, hydrochlorothiazide, and spironolactone look different because the umbrella category brings together different families. Do not force one suffix rule onto the whole list.
Use a two-column scratch sheet with a brand on the left and “generic + type” on the right. Lasix should lead to furosemide and loop; Thalitone to chlorthalidone and thiazide-like; Aldactone to spironolactone and potassium-sparing. Mixing the groups helps reveal whether you know the class or are just remembering the order of the table.
Commonly confused diuretic names
Hydrochlorothiazide and chlorthalidone
Microzide—hydrochlorothiazide and Thalitone—chlorthalidone are separate pairs. The shared “chlor” letters do not make the names interchangeable. Hydrochlorothiazide is often shortened to HCTZ; recognize the abbreviation while learning the full spelling.
Dyazide and Hyzaar
Dyazide contains hydrochlorothiazide and triamterene: two diuretic ingredients. Hyzaar contains hydrochlorothiazide and losartan: a diuretic plus an ARB. Similar-sounding brands require different complete answers.
Aldactone and the broader potassium-sparing group
Aldactone means spironolactone. “Potassium-sparing” is a class description, not the generic name and not a synonym for spironolactone alone.