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Lasix is a prescription loop diuretic containing furosemide. Current tablets contain 20 mg, 40 mg, or 80 mg. It is indicated for edema associated with congestive heart failure, liver cirrhosis, and kidney disease in adults and pediatric patients, and for hypertension in adults.
read more about lasix ...Furosemide inhibits sodium and chloride reabsorption in the ascending limb of the loop of Henle and other parts of the nephron. Increased urinary excretion of sodium, chloride, and water reduces excess fluid volume and can lower blood pressure.
Lasix is used in adults and children with edema associated with congestive heart failure, liver cirrhosis, or kidney disease including nephrotic syndrome. Oral Lasix is also used in adults with hypertension alone or with other antihypertensive medicines.
Adults with edema usually start with 20 mg to 80 mg as a single dose. The dose can be repeated or increased at intervals of six to eight hours according to diuretic response. Adult hypertension usually starts at 80 mg daily divided as 40 mg twice daily. Pediatric edema usually starts at 2 mg per kg as a single dose.
Lasix is a potent diuretic and excessive dosing can cause profound diuresis with dehydration and electrolyte depletion. Other serious concerns include hypotension, kidney dysfunction, hypokalemia, hyponatremia, hearing loss or tinnitus, severe skin reactions, pancreatitis, blood-cell disorders, and hepatic encephalopathy in susceptible patients. Anuria is a contraindication.
Lasix treats edema associated with heart failure, liver cirrhosis, or kidney disease and is also used for adult hypertension.
The usual initial dose is 20 mg to 80 mg given once.
The usual initial dose is 80 mg daily, commonly divided as 40 mg twice daily.
Yes. Excessive diuresis can cause low potassium, low sodium, dehydration, and other fluid or electrolyte abnormalities.
DailyMed - LASIX (furosemide) tablet. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=2c9b4d8f-0770-482d-a9e6-9c616a440b1a. Date Accessed October 8, 2026.
Furosemide. MedlinePlus. https://www.medlineplus.gov/druginfo/meds/a682858.html. Date Accessed October 8, 2026.
Furosemide. PubChem. https://pubchem.ncbi.nlm.nih.gov/compound/Furosemide. Date Accessed October 8, 2026.
Furosemide. StatPearls. https://www.ncbi.nlm.nih.gov/books/NBK499921/. Date Accessed October 8, 2026.
Loop Diuretics. LiverTox. https://www.ncbi.nlm.nih.gov/books/NBK548619/. Date Accessed October 8, 2026.