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  • Load image into Gallery viewer, Furosemide
  • Load image into Gallery viewer, Furosemide


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What is this medication?

LASIX (Furosemide)
Antihypertensive, Loop Diuretic

LASIX (Furosemide) is indicated for ascites (fluid buildup in abdomen from liver cirrhosis), various forms of edema (fluid buildup) (may be used for conditions not listed).

Furosemide is a potent diuretic that, if given in excessive amounts, can lead to a profound diuresis with water and electrolyte depletion. Therefore, careful medical supervision is required and dose and dose schedule must be adjusted to the individual patient’s needs.

How does this medication work? 

LASIX (Furosemide) inhibits sodium and chloride reabsorption in the loop of Henle, as well as the proximal and distal tubules of the nephron (functional unit of the kidney) causing sodium to be excreted in the urine which bring water with it due to it forming a concentration gradient.

How should I take this medication? 

Oral: Take 20-160 mg daily depending on condition divided into one or two daily doses.

How to Take: Follow instructions provided by physician/pharmacy label, take consistently at same times each day unless otherwise directed, ideally taken early in the day to avoid nocturia (waking up to urinate).

Note: Do not skip follow up appointments or put off bloodwork requisitioned by your physician.  Serious electrolyte disturbances may occur without proper monitoring.

What should I watch for while using this medication? 

Before starting LASIX (Furosemide), make sure your physician is aware of any allergies (potential for sulfa cross reactivity) or medications you currently take, if you have diabetes, gout, have had bariatric surgery, cirrhosis, an enlarged prostate, or are pregnant or breastfeeding.  This medication if given in excessive doses can result in very significant diuresis which can lead to fluid and electrolyte depletion so patients must be monitored closely.

What if I miss a dose?

If you miss a dose of medication, try to take it as soon as possible. However, if it is almost time for your next dose, take only that scheduled dose. Do not take double or extra doses.

How should I store this medication?

Keep out of the reach of children at all times. Store at room temperature, 59 to 86° F (15 to 30° C). Protect from light. Keep the container tightly closed. Properly dispose of any unused medication after the expiration date.

What are the possible side effects of using this medication?

Orthostatic hypotension, urinary frequency, dizziness, nausea, vomiting, muscle cramps, electrolyte disturbances, photosensitivity, stomach upset.

Note this is not a complete list of side effects for LASIX (Furosemide), only common ones.