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What should I discuss with my healthcare provider before taking furosemide (Lasix)?
Do not use this medication if you are unable to urinate.
To make sure you can safely take furosemide, tell your doctor if you have any of these other conditions:
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 will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication.
Furosemide can pass into breast milk and may harm a nursing baby. This medication may also slow breast milk production. Do not use this medication without telling your doctor if you are breast-feeding a baby.
How should I take furosemide (Lasix)?
Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label.
Do not take more of this medication than is recommended. High doses of furosemide may cause irreversible hearing loss.
Your doctor may occasionally change your dose to make sure you get the best results.
Measure liquid medicine 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.
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 often. Your kidney or liver function may also need to be tested. Visit your doctor regularly.
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 at room temperature away from moisture, heat, and light.
Furosemide 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.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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