Furosemide (Lasix)

Question 1

Class

Answer 1

Loop Diuretic

Question 2

Action

Answer 2

Inhibits sodium and chloride reabsorption in the proximal tubule and loop of Henle which draws water with it and causes diuresis. This diuresis effect occurs about 10 minutes after IV dose.
Direct venodilating effects which decreases venous return to the heart (decreases preload.) This effect is seen before the diuresis effect.

Question 3

Indications

Answer 3

Acute cardiogenic pulmonary edema
Hypertensive Crisis
Chronic CHF

Question 4

Dosage

Answer 4

100mg/10cc IV

Question 5

Contraindications

Answer 5

Allergy to sulfonamides
Dehydrated patient
Anuric patient
Electrolyte Depletion

Question 6

Side effects

Answer 6

Hypovolemia, orthostatic hypotension
Transient deafness, tinnitus
Muscle cramps, and weakness
Electrolyte Problems: sodium, potassium, calcium, and magnesium depletion.
Signs of hypokalemia: postural hypotension, malaise, fatigue, leg cramping, and weakness.

Question 7

Precautions

Answer 7

Auscultate lung sounds before and after administration.

May potentiate effects of digitalis.