Vancomycin Use in Myasthenia Gravis

Introduction to Safe Antibiotic Use

The American College of Cardiology and other guideline societies recommend avoiding aminoglycosides, fluoroquinolones, and macrolides in patients with myasthenia gravis due to their potential to worsen myasthenic symptoms 1, 2, 3, 4

Aminoglycosides, such as streptomycin, amikacin, kanamycin, and gentamicin, are absolute contraindications in myasthenia gravis due to impaired neuromuscular transmission and risk of neuromuscular blockade 3, 4, 2
Fluoroquinolones, including norfloxacin, ofloxacin, pefloxacin, and moxifloxacin, should be used with caution as they can decrease neuromuscular transmission 1
Macrolide antibiotics, such as azithromycin and erythromycin, carry significant risk and are listed under cautions rather than absolute contraindications 1, 2

Vancomycin is safe to use in patients with myasthenia gravis, as it does not impair neuromuscular transmission or potentiate neuromuscular blocking agents 3, 4
However, vancomycin requires careful monitoring of renal function and dose adjustments in renal insufficiency to avoid treatment failure 5, 6
The European Respiratory Society recommends avoiding combinations of vancomycin with aminoglycosides in MG patients due to increased risk of nephrotoxicity and neuromuscular complications 5

Linezolid may be considered as an alternative to vancomycin for MRSA pneumonia, particularly in patients with renal insufficiency, due to its potential for superior outcomes 5

The American Thoracic Society recommends maintaining baseline MG therapy, including pyridostigmine and corticosteroids, during antibiotic treatment unless the patient becomes intubated 1