What is the brand name for Furosemide?
The brand name for Furosemide is Lasix.
PTCE Top 200 · #29
Furosemide
Lasix
Furosemide is the generic name for the brand-name drug Lasix. It is a loop diuretic used to treat edema, HF. On the PTCE Top 200 drug list, Furosemide ranks #29 and is one of the most frequently tested cardiovascular medications — commonly quizzed on its brand–generic pair, drug class, and key side effects.
| Generic name | Furosemide |
|---|---|
| Brand name(s) | Lasix |
| Drug class | Loop diuretic |
| Class group | Cardiovascular |
| Common use | edema, HF |
| DEA schedule | Unscheduled |
| Availability | Prescription only (Rx) |
What is Furosemide used for?
Loop diuretic for edema due to heart failure, liver disease, or kidney disease; also used for hypertension in select patients.
What drug class is Furosemide?
Furosemide is a Loop diuretic in the Cardiovascular group. Knowing the class is the fastest way to predict its uses, side effects, and the brand↔generic pairs the PTCE tests.
Common side effects of Furosemide
- arrow_rightFrequent urination
- arrow_rightLow potassium (hypokalemia)
- arrow_rightDehydration
- arrow_rightDizziness/low blood pressure
- arrow_rightIncreased creatinine
Major interactions
- arrow_rightAminoglycosides or other ototoxic drugs ↑ hearing damage risk
- arrow_rightDigoxin toxicity risk increases with hypokalemia
- arrow_rightLithium levels may increase (toxicity risk)
- arrow_rightNSAIDs may reduce diuretic effect and worsen kidney function
Is Furosemide a controlled substance?
No. Furosemide is not a federally controlled substance (it is unscheduled by the DEA).
warning Boxed warning
WARNING (often presented as a boxed warning): Potent diuretic—excessive doses can cause profound diuresis with water/electrolyte depletion; requires careful monitoring.
How to remember Furosemide (PTCE mnemonic)
LAS-ix LASTS '6' hours of pee — furosemide is the loop. ↓K+, ↓Mg, ↓Na+, ototoxic, sulfa allergy; 'OH DAMN' side effects.
lightbulb
PTCE exam tip
Furosemide (Lasix) is a loop diuretic — 'Lasix lasts six hours.' Watch for LOW potassium, the opposite of potassium-sparing diuretics.
Furosemide FAQ
What is Furosemide used for?
Furosemide is used to treat edema, HF. Loop diuretic for edema due to heart failure, liver disease, or kidney disease; also used for hypertension in select patients.
What drug class is Furosemide?
Furosemide is a Loop diuretic (Cardiovascular group).
Is Furosemide a controlled substance?
No. Furosemide is not a federally controlled substance (it is unscheduled by the DEA).
Related drugs in the Cardiovascular group
Drill Furosemide the way the PTCE asks it
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Last reviewed June 25, 2026. Educational use only — not medical advice. Verify clinical specifics with your pharmacist or a current label source such as DailyMed. RxReflex is not affiliated with or endorsed by the Pharmacy Technician Certification Board (PTCB).