Furosemide: Uses & Side Effects

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).

Uses

Take furosemide exactly as prescribed by your doctor. Follow all directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results. Do not use this medicine in larger or smaller amounts or for longer than recommended.

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

Measure liquid medicine with the dosing syringe provided, or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one.

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.

While using this medicine, you may need frequent blood tests.

Keep using this medicine as directed, 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 this medicine.

Store at room temperature away from moisture, heat, and light. Throw away any furosemide oral solution (liquid) 90 days after opening the bottle, even if it still contains unused medicine.

Side effects

Get emergency medical help if you have signs of an allergic reaction to furosemide: (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:

  • ringing in your ears, hearing loss;
  • easy bruising, unusual bleeding;
  • sudden weakness or ill feeling, fever, chills;
  • painful or difficult urination;
  • numbness, tingling, or burning pain;
  • a light-headed feeling, like you might pass out;
  • high blood sugar – increased thirst, increased urination, dry mouth, fruity breath odor;
  • 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);
  • kidney problems – little or no urination, swelling in your feet or ankles, feeling tired or short of breath; or
  • signs of an electrolyte imbalance – dry mouth, increased thirst, mood changes, weakness, drowsiness, lack of energy, muscle pain, fast heartbeats, feeling restless, nausea, vomiting.

Common furosemide side effects may include:

  • diarrhea, constipation;
  • numbness or tingling;
  • headache, dizziness; or
  • blurred vision.

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* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.