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Table 1 Medications that may exacerbate weakness in myasthenia gravis

From: Myasthenia gravis

D-penicillamine
Curare and related drugs
Selected antibiotics including aminoglycosides (tobramycin, gentamycin, kanamycin, neomycin, streptomycin), macrolides (erythromycin, azithromycin, telithromycin [Ketek®]), and fluoroquinolones (ciprofloxacin, norfloxacin, ofloxacin, pefloxacin)
Quinine, quinidine or procainamide
Beta-blockers
Calcium channel blockers
Magnesium salts (milk of magnesia, some antacids, tocolytics)
Botulinum toxin