FDA pharmacologic class
Loop diuretics
4 medicines are in FDA's class of loop diuretics (loop diuretics): furosemide (Lasix), bumetanide (Bumex), torsemide (Soaanz) and ethacrynic acid (Edecrin). All 4 are listed from generic labelers (FDA NDC Directory, October 8, 2026). The lowest pharmacy cost is torsemide 20 mg tablet at $0.0636 per tablet (NADAC).
Which medicines are loop diuretics?
| Medicine | Brand names | Generic labelers (all forms) | Pharmacy cost | Boxed warning | Shortage | Recalls since 2012 |
|---|---|---|---|---|---|---|
| Furosemide | Lasix, Furoscix | 52 labelers | $0.490 per mL 20 mg/2 mL vial | No | In shortage | 8 |
| Bumetanide | Bumex, Enbumyst | 36 labelers | $0.108 per tablet 1 mg tablet | Yes | Resolved | 4 |
| Torsemide | Soaanz | 20 labelers | $0.0636 per tablet 20 mg tablet | No | No current entry | 2 |
| Ethacrynic acid | Edecrin | 10 labelers | $0.807 per tablet 25 mg tablet | No | No current entry | 2 |
Source: FDA Established Pharmacologic Class (NDC Directory, openFDA); CMS NADAC of October 7, 2026; FDA shortages and recalls (FDA files October 8, 2026)
What do pharmacies pay?
Each medicine's most widely listed form, per unit, in the NADAC survey: what pharmacies paid, not what a patient pays; strengths differ, so compare like with like.
Source: CMS National Average Drug Acquisition Cost (NADAC) survey, October 7, 2026: what retail pharmacies paid per unit; not a counter price