Succinylcholine

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See critical care quick reference for drug doses by weight.

General

Adult Dosing

  • 1.5 mg/kg IV
  • 4 mg/kg IM (in extremis)

Pediatric Dosing

See critical care quick reference for drug doses by weight.

Special Populations

  • Pregnancy Rating: C
  • Lactation: Unknown if compound is excreted in breast milk
  • Renal Dosing
    • Adult: None specified by manufacturer
    • Pediatric
  • Hepatic Dosing
    • Adult: None specified by manufacturer
    • Pediatric

Contraindications

  • Hyperkalemia
  • Preexisting hyperkalemia
  • Burns >5d old
  • Crush injury >5d old
  • Severe infection >5d old
  • Neuromuscular diseases (e.g. Myasthenia Gravis), myopathies
  • History of Malignant Hyperthermia
  • Allergy to class/drug

Adverse Reactions

Serious

  • Fatal hyperkalemia
  • Malignant hyperthermia
  • Masseter spasm

Common

Pharmacology

  • Onset: IV: 30-60 seconds; IM: 2-3 minutes
  • Metabolism: Plasma pseudocholinesterase hydrolysis
  • Excretion: Urine
  • Mechanism of Action: Depolarization of the myoneural junction motor endplate
  • Duration of Action: IV: 4-6 minutes; IM 10-30 minutes

See Also

Sources

  • Levitan, R. Annals of EM. Vol 45, Issue 2. Safety of succinylcholine in myasthenia gravis.