Drug Notebook

FDA Alerts

  • Furosemide is a potent diuretic that given in excessive amounts may induce a profound diuresis with water and electrolyte depletion. Careful medical supervision is required; dosage selection and titration should be adjusted to the individual patient’s needs. (See Dosage and Administration.)

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furosemide
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(fur OH se mide)

How should I take furosemide?

Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label.

Your doctor may occasionally change your dose to make sure you get the best results from this medication.

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.

To be sure this medication is not causing harmful effects, your blood will need to be tested on a regular basis. Your kidney or liver function may also need to be tested. Do not miss any scheduled appointments.

If you are being treated for high blood pressure, keep using this medication even if you feel fine. High blood pressure often has no symptoms.

Store this medication at room temperature away from heat, light, and moisture.

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 missed dose as soon as you remember. If it is almost time for the next dose, skip the missed dose and wait until your next regularly scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention if you think you have used too much of this medicine. Overdose symptoms may include ringing in your ears, loss of appetite, weakness, dizziness, confusion, feeling light-headed, or fainting.

What should I avoid while taking furosemide?

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

Avoid exposure to sunlight or artificial UV rays (sunlamps or tanning beds). Furosemide can make your skin more sensitive to sunlight and sunburn may result. Use a sunscreen (minimum SPF 15) and wear protective clothing if you must be out in the sun.
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