Furosemide (Lasix)

Question 1

Furosemide Class?

Answer 1

Loop diuretic

Question 2

Furosemide Action?

Answer 2

Furosemide is a potent diuretic that inhibits the reabsorption of sodium and chloride in the proximal tubule and loop on Henle. IV doses can also reduce cardiac preload by increasing venous capacitance.

Question 3

Furosemide Indications?

Answer 3

Pulmonary edema (CHF) with SBP > 90, hypertensive emergencies, hyperkalemia

Question 4

Furosemide Contraindications?

Answer 4

Anuria, hypersensitivity, hypovolemia, hypokalemia

Question 5

Furosemide Onset/Duration?

Answer 5

Onset: 15-20 min IV
Duration: 2 hrs

Question 6

Furosemide Dose/Route?

Answer 6

Adult: 20-40 mg IV over 1-2 min. If no response double dose up to 2 mg/kg over 1-2 min. Most services allow up to a max of 40-80 mg IV.

Peds: 1 mg/kg/dose IV over 1-2 min with a total max of 6 mg/kg

Question 7

Furosemide Side Effects?

Answer 7

Tinnitus and hearing loss (if given too quickly), hypotension, hypokalemia, hyponatremia, hypocalcemia, hyperglycemia

Question 8

Furosemide Notes*

Answer 8

Must give slowly or may cause permanent hearing problems.