Compare Lasix vs. spironolactone

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Lasix (Furosemide)

Prescription only
Lowers blood pressure. Removes extra water from your body.

Lasix (Furosemide) is a very effective water pill and it'll certainly make you go to the bathroom more often.

3.7/ 5 average rating with 371 reviewsforLasix
Removes extra water from your body.

Aldactone (spironolactone) should be used with other medicines to get rid of excess fluid in your body, especially if you have heart failure.

Upsides
  • A strong diuretic (water pill) that works well to get rid of extra fluids in your body through urination.
  • Lowers your blood pressure and your risk of heart attack and stroke.
  • Works better than thiazide diuretics (like Hydrochlorothiazide) at removing harmful levels of certain electrolytes, such as potassium.
  • Okay to take if you have kidney problems.
  • Has a low risk of causing muscle problems from low potassium levels in your blood.
  • More useful when taken with another diuretic that'll also help your body get rid of extra fluids.
  • Can lower blood pressure.
  • Reduces the risk of death in people with heart failure.
Downsides
  • Makes you urinate very frequently.
  • Can cause low levels of important electrolytes, such as potassium.
  • Aldactone (spironolactone) doesn't work well on its own. It should be used with another drug to help get rid of excess fluids.
  • Has many possible side effects, especially when higher doses are used.
  • Can increase the risk of tumor growth.
  • You'll need to have blood tests done regularly since Aldactone (spironolactone) can affect your potassium levels and kidneys.
Used for
Dosage forms
  • Pill
  • Liquid
  • Pill
Price
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Reviews
371 reviews so far
67%
saidit'sworth it
47%
saiditworked well
16%
saidit'sa big hassle

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Side effects
The Lasix (Furosemide) FDA package insert doesn’t have numbers about how common side effects are.
The Aldactone (spironolactone) FDA package insert doesn’t have numbers about how common side effects are.
Risks and risk factors
  • Dehydration and electrolyte imbalance
    • Current electrolyte imbalance
  • Severe allergic reactions
    • History of sulfa allergies
  • Hearing problems
    • Current kidney problems
    • Dose too high
    • Low blood protein
    • Other medicines that causes hearing problems
See more detailed risks and warnings
  • Tumor development
  • Low blood pressure
    • Taking with alcohol
    • Taking other medicines that lower your blood pressure
  • Heart problems from high potassium
    • Current kidney problems
    • Taking other medicines that increase potassium
    • Use of salt substitutes
  • Breast pain or swelling
See more detailed risks and warnings