Rhabdomyolysis in Emergency Medicine Medication
- Author: Sandy Craig, MD; Chief Editor: Rick Kulkarni, MD more...
Medication Summary
Medical therapy for rhabdomyolysis focuses on restoring adequate intravascular volume using isotonic crystalloid. Adjunctive measures that may decrease the incidence of acute myoglobinuric renal failure include urinary alkalinization and osmotic and loop diuresis.
Alkalinizing agents
Class Summary
Sodium bicarbonate is administered IV to alkalinize urine in patients with rhabdomyolysis. This may prevent toxicity caused by the presence of myoglobin in acidic urine and crystallization of uric acid.
Sodium bicarbonate (Neut)
Useful in alkalization of urine to prevent acute myoglobinuric renal failure. Titrate dose to increase pH to >7.
Osmotic diuretics
Class Summary
These agents increase osmolarity of glomerular filtrate and induce diuresis. They hinder tubular reabsorption of water, causing sodium and chloride excretion to increase.
Mannitol (Osmitrol)
Alternative diuretic used when urine output is inadequate despite aggressive fluid therapy.
Initially assess for adequate renal function in adults by administering a test dose of 200 mg/kg IV over 3-5 min. Should produce a urine flow of at least 30-50 mL/h over 2-3 h.
In children, assess for adequate renal function by administering a test dose of 200 mg/kg IV over 3-5 min. It should produce a urine flow of at least 1 mL/h over 1-3 h.
Loop diuretics
Class Summary
These agents elicit a loss of free water, increasing diuresis.
Furosemide (Lasix)
Increases water excretion by interfering with the chloride-binding cotransport system, resulting in inhibition of sodium and chloride reabsorption in the ascending loop of Henle and distal renal tubule.
Individualize doses. Depending on response, administer at increments of 20-40 mg q6-8h until desired diuresis occurs. When treating infants, titrate with 1-mg/kg/dose increments until a satisfactory effect is achieved.
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