Myasthenia gravis: exacerbating factors

The most common exacerbating factor is exertion resulting in fatigability, which is the hallmark feature of myasthenia gravis.. Symptoms become more marked during the day

The following drugs may exacerbate myasthenia:

penicillamine
quinidine, procainamide
beta-blockers
lithium
phenytoin
antibiotics: gentamicin, macrolides, quinolones, tetracyclines

+PassMedicine Notes

The most common exacerbating factor is exertion resulting in fatigability, which is the hallmark feature of myasthenia gravis.. Symptoms become more marked during the day

The following drugs may exacerbate myasthenia: