Furosemide (Lasix) –
What You Should Know

Brand Name: Lasix, Diaqua-2, Lo-Aqua

What is Furosemide (Lasix)?

The Information about Furosemide (Lasix) contained herein is a compilation of materials available from drugs.com and simplified for the average consumer.


furosemide bottleFurosemide also known by the brand name Lasix, Diaqua-2 and Lo-Aqua is a loop diuretic, that works by making the kidneys pass out more fluid. As more fluid is passed out by the kidneys, less fluid remains in the bloodstream.

They do this by interfering with the transport of salt and water across certain cells in the kidneys. (These cells are in a structure called the loop of Henle – hence the name loop diuretic. You have thousands of these loops in each kidney.)

There are drug free alternatives to lowering your blood pressure that may be effective for you. Read about them here.

How to use Furosemide (Lasix):

  • furosemide liquidUse Furosemide (Lasix) as directed by your doctor. Check the label on the Furosemide bottle for exact dosing instructions. Do not take more than is recommended, as high doses of may cause irreversible hearing loss. Your doctor may occasionally change your dose to make sure you get the best results.
  • If you are using a liquid Furosemide (Lasix) measure it with a special dose-measuring spoon or medicine cup, not with a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist for one.
  • While using it, you may need to visit your doctors office for regular blood tests.
  • Store Furosemide (Lasix) at room temperature away from moisture, heat, and light.
  • Furosemide (Lasix) liquid medicine should be used within 60 to 90 days after opening the bottle. Ask your pharmacist how many days your medicine is good for.
  • Throw away any unused  liquid after that time has passed.
  • Furosemide (Lasix) is sometimes used only once, so you may not be on a dosing schedule. If you are using it regularly, take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra Furosemide (Lasix) to make up the missed dose.

Ask your health care provider any questions you may have about how to use Furosemide (Lasix).

What to know before using Furosemide (Lasix):

If any of the following apply to you, discuss with your doctor before taking Furosemide (Lasix):

  • kidney diseasehypercholesterolemia
  • enlarged prostate, bladder obstruction or other urination problems
  • cirrhosiss or other liver disease
  • an electrolyte imbalance (such as low levels of potassium or magnesium in your blood)
  • high cholesterol or triglycerides (a type of fat in the blood)
  • gout
  • lupus
  • diabetes
  • an allergy to sulfa drugs

You should not use Furosemide (Lasix) if you are unable to urinate.

Tell your doctor if you have recently had an MRI (magnetic resonance imaging) or any type of scan using a radioactive dye that is injected into your veins.

FDA pregnancy category C. It is not known whether Furosemide (Lasix) will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication. Furosemide (Lasix) can pass into breast milk and may harm a nursing baby. This medication may also slow breast milk production. Do not use Furosemide (Lasix) without telling your doctor if you are breast-feeding a baby.

Side effects of Furosemide (Lasix):

Get emergency medical help if you have any of these allergic reactions:

  • hives
  • difficulty breathing
  • swelling of your face, lips, tongue, or throat.

High doses of Furosemide (Lasix) may cause irreversible hearing loss.

Stop using Furosemide (Lasix) and call your doctor at once if you have any of these serious side effects:

  • ringing in your ears
  • hearing loss
  • itching
  • loss of appetite
  • dark urine,
  • clay-colored stools
  • jaundice (yellowing of the skin or eyes)
  • severe pain in your upper stomach spreading to your back
  • nausea and vomiting
  • weight loss or rapid weight gain
  • body aches
  • numbness
  • swelling
  • urinating less than usual or not at all
  • chest pain
  • new or worsening cough with fever
  • trouble breathing
  • pale skin
  • bruising
  • unusual bleeding
  • feeling light-headed
  • rapid heart rate
  • trouble concentrating
  • low potassium
  • confusion
  • uneven heart rate
  • leg discomfort
  • muscle weakness or limp feeling
  • low calcium
  • tingly feeling around your mouth
  • muscle tightness or contraction
  • overactive reflexes
  • headache
  • feeling unsteady
  • weak or shallow breathing
  • severe skin reaction
  • fever
  • sore throat
  • swelling in your face or tongue
  • burning in your eyes
  • skin pain followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.

Less serious side effects may include:

  • diarrhea
  • constipation
  • stomach pain
  • dizziness
  • spinning sensation
  • mild itching or rash.

The information about Furosemide comes from drugs.com


Furosemide (Lasix) Natural Alternatives:

tikvawithdrinkIf you are taking Furosemide (Lasix) or other diuretic medications, the various ingredients  in Tikva have been proven through either clinical trials or other research to lower your blood pressure naturally by dilating (widening) the arteries. Tikva does not act as a diuretic.

Several of the ingredients in Tikva can also increase circulation, dissolve plaque that is already in the arteries and reduce new plaque from forming. In addition, there are ingredients in Tikva to help reduce stress that often increases blood pressure without all of the side effects.
Read more about the natural ingredients in Tikva on our research and ingredients page, by clicking here.

watermellonVarious herbs, foods and beverages offer a natural diuretic effect; however, they should be used with caution, in the event of unknown medical conditions with fluid retention as a symptom, or due to side effects with other medications. Consult with your physician prior to using natural diuretics.

Cutting back on sodium and exercising more can also help reduce fluid buildup.

Eating more fruits and vegetables that act as diuretics, like watermelon, grapes, berries, celery, asparagus, onions, garlic, and bell peppers, may be another beneficial solution.


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The information provided on this page should not be used to decide whether or not to take Furosemide (Lasix) or any other medicine. Consult your doctor to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition.

This information about Furosemide (Lasix) is a brief summary and does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to Furosemide (Lasix).

This information is not specific medical advice and does not replace information you receive from your health care provider. You must speak with your doctor for complete information about the risks and benefits of using Furosemide (Lasix).