Furosemide is a strong diuretic, often called a water pill. It helps your kidneys remove extra salt and water. Doctors prescribe it for swelling and for conditions such as heart failure.
What Is Furosemide Used For?
- Swelling (edema) from heart failure, liver disease, or kidney disease
- High blood pressure
- Fluid in the lungs
How Does Furosemide Work?
Furosemide blocks the reabsorption of salt in the kidneys. More salt and water leave your body as urine, so swelling and blood pressure go down.
General Dosage Information
This is general information only. Your doctor sets the right dose for you, so follow your prescription and the label.
- Adults usually take 20 mg to 80 mg once or twice a day by mouth. Doctors may use higher doses or give it by injection.
- Take it in the morning, so you do not wake at night to urinate.
- Weigh yourself daily if your doctor advises it, and report quick weight gain.
Side Effects of Furosemide
Common Side Effects
- Frequent urination
- Dizziness, especially when you stand up
- Thirst and dry mouth
- Muscle cramps
- Tiredness
Serious Side Effects
Call your doctor or get emergency help if you notice:
- Severe dehydration: very dry mouth, confusion, or very little urine
- Low potassium: weakness, cramps, or irregular heartbeat
- Hearing changes or ringing in the ears
- Rash, blistering, or swelling of the face
- Severe stomach pain
Who Should Be Cautious?
- People who are allergic to sulfa drugs, because they may react
- People with kidney or liver disease
- People with gout or diabetes
- Older adults, who are more likely to become dehydrated
- Pregnant or breastfeeding women should ask their doctor
Drug Interactions
Tell your doctor and pharmacist about every medicine and supplement you take. Examples of important interactions include:
- Aminoglycoside antibiotics: together they can harm the ears and kidneys.
- NSAIDs: they can weaken furosemide.
- Digoxin: low potassium from furosemide can make digoxin toxic.
- Lithium: furosemide can raise its level.
- ACE inhibitors and ARBs: the first dose together can lower blood pressure too much.
- Other blood pressure medicines: they can add to the effect.
Storage and Precautions
- Store it at room temperature, away from heat, light, and moisture.
- Keep it out of the reach of children.
Frequently Asked Questions
Why do I take it in the morning?
It makes you urinate often for several hours.
Should I eat bananas?
Ask your doctor. Some people need potassium, but others do not.
Can I stop it when swelling goes down?
No. Ask your doctor first.
Disclaimer: This article is for information only. It is not medical advice. Please talk to your doctor about your own health.