Furosemide
Lasix (furosemide) is a loop diuretic that helps the body eliminate excess fluid and salt through increased urine production. It is commonly prescribed to treat fluid retention associated with conditions like heart failure, liver disease, and kidney disorders, as well as to manage high blood pressure.
Lasix is a diuretic used to remove excess fluid from the body and treat conditions like heart failure, liver disease, and high blood pressure.
Key facts at a glance
- RxNorm
- 202991
- Generic
- Lasix
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Lasix is used to treat edema (fluid retention) caused by congestive heart failure, liver cirrhosis, kidney disease, and other conditions. It is also prescribed for hypertension (high blood pressure) either alone or in combination with other antihypertensive agents.
As a loop diuretic, Lasix works by inhibiting the sodium-potassium-chloride cotransporter in the ascending limb of the loop of Henle in the kidneys. This prevents reabsorption of sodium and water, promoting increased urine output and reducing overall fluid volume in the body.
Lasix may cause electrolyte imbalances (particularly low potassium), dehydration, and changes in blood pressure. Patients should be monitored regularly for kidney function and electrolyte levels. It may interact with other medications including digoxin, lithium, and certain antibiotics. Patients should report signs of severe dehydration, hearing problems, or unusual weakness.
Official drug label
WellAlly may earn a referral fee from linked resources at no extra cost to you. Editorial content is never influenced by commercial relationships.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy