Compare Lasix vs. Aldactone

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

Lasix
(Furosemide)

Aldactone
(Spironolactone)

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.Removes extra water from your body. Aldactone (Spironolactone) is helpful when added to another diuretic to get rid of excess fluid in your body. Doesn't work well on its own.
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Reviews & ratings
Button Group. All currently active
Button Group. All currently active
5.054054054054054Lasix
Reviews for Lasix (Furosemide)
66%
of people say Lasix (Furosemide) is worth it
47%
say it works well
16%
say it's a big hassle

Not enough reviews for this drug. Help someone out, leave a review!

Side effects
LasixAldactone

The Lasix FDA package insert doesn’t have numbers about how common side effects are.

More about Lasix side effects »

We haven’t found good data for Aldactone side effects.

FDA side effect reports for Aldactone »
How it works
LasixAldactone
Lasix (Furosemide) is a loop diuretic (water pill). It works in the kidneys to make you urinate more, which removes extra water and certain electrolytes. This lowers blood pressure and swelling.Aldactone (Spironolactone) is a potassium-sparing diuretic that blocks aldosterone (a hormone) and helps the kidney get rid of excess fluids in your body.
Type of medication
LasixAldactone
Antihypertensive
Diuretic
Prescription only
Antihypertensive
Diuretic
Prescription only
Available as
LasixAldactone
  • Pill
  • Liquid
  • Pill
Used for (click to learn more)
LasixAldactone
Risk factors for serious side effects
LasixAldactone
  • Current electrolyte imbalance
  • History of sulfa allergies
  • Current kidney problems
  • Dose too high
  • Low blood protein
  • Other medicines that causes hearing problems
Detailed Lasix (Furosemide) risks & warnings »
    • Taking with alcohol
    • Taking other medicines that make you less alert
    • Current kidney problems
    • Medicine that increase potassium
    • Use of salt substitute
      Detailed Aldactone (Spironolactone) risks & warnings »
      Pregnancy category
      LasixAldactone
      CFDA pregnancy category (Weigh risks vs. benefits)

      Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

      See the FDA package insert
      CFDA pregnancy category (Weigh risks vs. benefits)

      Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

      See the FDA package insert
      Alcohol
      No specific alcohol-related info.No specific alcohol-related info.
      Food
      No specific food-related info.No specific food-related info.
      Kidneys and liver
      • Okay to take if you have kidney problems.
      • Requires routine blood tests to check kidney function.
      • Needs to have blood tests done to monitor electrolyte levels and kidney function.
      • Aldactone (Spironolactone) can increase the amount of potassium in your body. High potassium can cause heart problems. Baseline and routine blood tests are needed to monitor your potassium and kidney function.
      Sex
      No specific sex-related info.
      • You can have breast pain/swelling, irregular periods (women), or trouble with sexual performance.
      Sleep
      No specific sleep-related info.No specific sleep-related info.
      Weight
      No specific weight-related info.No specific weight-related info.
      Upsides and benefits
      LasixAldactone
      • 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 due to 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 and risks
      LasixAldactone
      • Makes you urinate very frequently.
      • Can cause low levels of important electrolytes, such as potassium.
      • Not very good at getting rid of excess fluids on its own. 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.
      • Needs to have blood tests done to monitor electrolyte levels and kidney function.
      Tips from our pharmacists for people taking the medication
      LasixAldactone
      • Starts working in 30 minutes.
      • Makes you urinate more often, so avoid taking it at bedtime.
      • Can cause dizziness in the first few days.
      • Check your blood pressure 1 week after starting this medicine, and tell your doctor if it hasn't improved.
      • Tell your doctor about any dizziness, fatigue, or muscle weakness that doesn't go away.
      • Requires routine blood tests to check kidney function.
      • Can make you dizzy or cause trouble concentrating, so be careful using it until you know how the medicine affects you.
      • Don't use supplements or salt substitutes that are high in potassium.
      • You can have breast pain/swelling, irregular periods (women), or trouble with sexual performance.
      • Tell your doctor about any muscle weakness, skin changes, red or black tarry stool.
      • Can take 2 to 3 days to see full diuretic effects and 2 to 3 weeks to see blood pressure lowering effects.
      Learn more
      More about LasixSide effectsReviews & ratingsAlternativesFDA package insert
      More about AldactoneSide effectsReviews & ratingsAlternativesFDA package insert