Indications
Furosemide (sold as Frusin, among other brands) is used for fluid retention linked to chronic congestive cardiac failure, if diuretic treatment is required. It is also used for fluid retention in acute congestive cardiac failure and in chronic renal failure. In acute renal failure, it helps maintain fluid excretion, including when the kidney failure is due to pregnancy or burns. It is used for fluid retention in nephrotic syndrome, if diuretic treatment is required. For fluid retention in liver disease, it is used if necessary to supplement treatment with aldosterone antagonists. Furosemide is also indicated for hypertension and, as a supportive measure, for hypertensive crisis. The last use is support of forced diuresis.
⚠️ Always consult a registered physician before taking any medicine.
Pharmacology
Furosemide is a monosulphonyl diuretic. It works well even when the glomerular filtration rate (GFR) is low, so it keeps its activity there. Its action on renal tubular function is distinctive, and it produces a peak diuresis far greater than other agents do. Other features are (I) a prompt onset of action, (II) inhibition of sodium and chloride transport in the ascending limb of the loop of Henle, and (III) an action that doesn't depend on acid-base balance changes. Furosemide acts mainly by inhibiting electrolyte reabsorption in the thick ascending limb of the loop of Henle. The gastrointestinal tract absorbs furosemide readily, and a considerable proportion binds to plasma proteins. The urine clears it rapidly. Within an hour after intravenous injection, the effect shows in about 5 minutes and lasts for about 2 hours.
Pregnancy & Breastfeeding
Furosemide is pregnancy category C. Use it with caution in the first trimester of pregnancy, and also in cardiogenic shock complicated by pulmonary oedema. Blood pressure and pulse should be monitored during rapid diuresis. Take care with patients who are liable to electrolyte deficiency.
For a nursing mother, furosemide may inhibit lactation or may pass into breast milk. So it should be used with caution in that case too.
⚠️ Talk to your doctor before taking any medicine during pregnancy or while breastfeeding.
Dosage Reference
⚠️ Reference ranges from official sources only. Consult your doctor for personalized dosing.
Side Effects & Interactions
Side Effects
No side-effect data recorded yet.
Key Interactions
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- Furosemide + Spironolactone
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