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furosemide

Generic Name: furosemide

What is furosemide?

Furosemide is a loop diuretic (water pill) that prevents your body from absorbing too much salt. This allows the salt to instead be passed in your urine.

Furosemide is used to treat fluid retention (edema) in people with congestive heart failure, liver disease, or a kidney disorder such as nephrotic syndrome.

Furosemide is also used to treat high blood pressure (hypertension).

Furosemide may also be used for purposes not listed in this medication guide.

What are the possible side effects of furosemide?

Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning in your eyes, skin pain, red or purple skin rash that spreads and causes blistering and peeling).

Call your doctor at once if you have:

  • a light-headed feeling, like you might pass out;
  • ringing in your ears, hearing loss;
  • muscle spasms or contractions;
  • pale skin, easy bruising, unusual bleeding;
  • high blood sugar--increased thirst, increased urination, dry mouth, fruity breath odor;
  • kidney problems--little or no urination, swelling in your feet or ankles, feeling tired or short of breath;
  • signs of liver or pancreas problems--loss of appetite, upper stomach pain (that may spread to your back), nausea or vomiting, dark urine, jaundice (yellowing of the skin or eyes); or
  • signs of an electrolyte imbalance--dry mouth, thirst, weakness, drowsiness, feeling jittery or unsteady, vomiting, irregular heartbeats, fluttering in your chest, numbness or tingling, muscle cramps, muscle weakness or limp feeling.

Common side effects may include:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about furosemide?

You should not use this medicine if you are unable to urinate.

Do not take more than your recommended dose. High doses of furosemide may cause irreversible hearing loss.

What should I discuss with my healthcare provider before taking furosemide?

You should not use furosemide if you are allergic to it, or if you are unable to urinate.

Tell your doctor if you have ever had:

Tell your doctor if you have an MRI (magnetic resonance imaging) or any type of scan using a radioactive dye that is injected into your veins. Both contrast dyes and furosemide can harm your kidneys.

It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

It may not be safe to breastfeed while using this medicine. Ask your doctor about any risk. Furosemide may slow breast milk production.

How should I take furosemide?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Your doctor may occasionally change your dose. Use the medicine exactly as directed.

Furosemide oral is taken by mouth. Furosemide injection is injected into a muscle or given as an infusion into a vein. A healthcare provider will give you this injection if you are unable to take the medicine by mouth.

You may receive your first dose in a hospital or clinic setting if you have severe liver disease.

Do not take more than your recommended dose. High doses of furosemide may cause irreversible hearing loss.

Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).

Furosemide doses are based on weight in children. Your child's dose needs may change if the child gains or loses weight.

Furosemide will make you urinate more often and you may get dehydrated easily. Follow your doctor's instructions about using potassium supplements or getting enough salt and potassium in your diet.

Your blood pressure will need to be checked often and you may need other medical tests.

If you have high blood pressure, keep using this medicine even if you feel well. High blood pressure often has no symptoms. You may need to use blood pressure medicine for the rest of your life.

If you need surgery, tell the surgeon ahead of time that you are using furosemide.

Store at room temperature away from moisture, heat, and light. Throw away any unused oral liquid after 90 days.

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What happens if I miss a dose?

Furosemide is sometimes used only once, so you may not be on a dosing schedule. If you are using the medication regularly, take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include feeling very thirsty or hot, heavy sweating, hot and dry skin, extreme weakness, or fainting.

What should I avoid while taking furosemide?

Avoid getting up too fast from a sitting or lying position, or you may feel dizzy.

Avoid becoming dehydrated. Follow your doctor's instructions about the type and amount of liquids you should drink while you are taking furosemide.

Drinking alcohol with this medicine can cause side effects.

If you have high blood pressure, ask a doctor or pharmacist before taking any medicines that can raise your blood pressure, such as diet pills or cough-and-cold medicine.

What other drugs will affect furosemide?

Sometimes it is not safe to use certain medications at the same time. Some drugs can affect your blood levels of other drugs you take, which may increase side effects or make the medications less effective.

If you also take sucralfate, take your furosemide dose 2 hours before or 2 hours after you take sucralfate.

Tell your doctor about all your other medicines, especially:

This list is not complete. Other drugs may affect furosemide, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

Where can I get more information?

Your pharmacist can provide more information about furosemide.


Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

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Reviewed on 7/23/2019

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