torsemide (oral/injection) (Demadex, Demadex I.V., Soaanz)

Brand Names: Demadex, Demadex I.V.

Generic Name: torsemide (oral/injection)

What is torsemide (Demadex, Demadex I.V.)?

Torsemide is a loop diuretic (water pill) that is used to treat fluid retention (edema) in people with heart failure, liver disease, or kidney disease.

Torsemide is also used to treat high blood pressure (hypertension). Lowering blood pressure may lower your risk of a stroke or heart attack.

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

What are the possible side effects of torsemide

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor right away if you have:

  • a light-headed feeling, like you might pass out;
  • ringing in your ears, sudden hearing loss;
  • kidney problems--little or no urination, painful or difficult urination, swelling in your feet or ankles, feeling tired or short of breath;
  • low magnesium level--dizziness, irregular heartbeats, feeling jittery, muscle cramps, muscle spasms, cough or choking feeling;
  • low potassium level--leg cramps, constipation, irregular heartbeats, fluttering in your chest, increased thirst or urination, numbness or tingling, muscle weakness or limp feeling; or
  • low sodium level--headache, confusion, slurred speech, severe weakness, vomiting, loss of coordination, feeling unsteady.

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 torsemide (Demadex, Demadex I.V.)?

You should not use this medicine if you are allergic to sulfa drugs or if you are unable to urinate.

What should I discuss with my healthcare provider before taking torsemide (Demadex, Demadex I.V.)?

You should not use torsemide if you are allergic to it, or if:

  • you are unable to urinate; or
  • you are allergic to an oral diabetes medicine.

Tell your doctor if you have ever had:

If you need to have any type of x-ray or CT scan using a dye that is injected into your veins, tell your caregivers that you currently take torsemide.

Tell your doctor if you are pregnant or plan to become pregnant. It is not known whether torsemide will harm an unborn baby. However, having high blood pressure during pregnancy may cause complications such as diabetes or eclampsia (dangerously high blood pressure that can lead to medical problems in both mother and baby). The benefit of treating hypertension may outweigh any risks to the baby.

It may not be safe to breastfeed while using this medicine. Ask your doctor about any risk.

Torsemide is not approved for use by anyone younger than 18 years old.

How should I take torsemide (Demadex, Demadex I.V.)?

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.

Torsemide oral is taken by mouth.

Torsemide injection is given as an infusion into a vein. A healthcare provider may teach you how to properly use the medication by yourself. Torsemide injection is given either as a slow infusion over 2 minutes, or as a continuous (around the clock) infusion.

If you have cirrhosis or other liver problems, you may receive your first injection in a hospital or clinic setting to quickly treat any serious side effects.

Read and carefully follow any Instructions for Use provided with your medicine. Ask your doctor or pharmacist if you don't understand all instructions.

Prepare an injection only when you are ready to give it. Do not use if the medicine has changed colors or has particles in it. Call your pharmacist for new medicine.

You may take torsemide with or without food.

Your blood pressure will need to be checked often, and you may need other medical tests. Your blood and urine may both be tested if you have been vomiting or are dehydrated.

Some things can cause your blood pressure to get too low. This includes vomiting, diarrhea, or heavy sweating. Call your doctor if you are sick with vomiting or diarrhea.

Your condition may be treated with a combination of drugs. Use all medications as directed by your doctor. Do not change your doses or medication schedule without your doctor's advice.

If you have high blood pressure, keep taking torsemide oral 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.

Store at room temperature away from moisture and heat.


In the U.S., 1 in every 4 deaths is caused by heart disease. See Answer

What happens if I miss a dose (Demadex, Demadex I.V.)?

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.

Call your doctor for instructions if you miss a dose of torsemide injection.

What happens if I overdose (Demadex, Demadex I.V.)?

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

Overdose symptoms may include dehydration, an electrolyte imbalance (such as low levels of potassium, magnesium, or sodium in your blood), or low blood pressure and fainting.

What should I avoid while taking torsemide (Demadex, Demadex I.V.)?

Avoid becoming overheated or dehydrated during exercise, in hot weather, or by not drinking enough fluids. Follow your doctor's instructions about the type and amount of liquids you should drink. In some cases, drinking too much liquid can be as unsafe as not drinking enough.

What other drugs will affect torsemide (Demadex, Demadex I.V.)?

Tell your doctor about all your current medicines. Many drugs can affect torsemide, especially:

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

Where can I get more information (Demadex, Demadex I.V.)?

Your pharmacist can provide more information about torsemide.

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 10/12/2022

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