Latent/overt neuromuscular disease particularly Duchenne muscular dystrophy. QT prolongation, ventricular arrhythmia (ped w/ Pompe's disease). Malignant hyperthermia & (rarely) seizure; patients w/ mitochondrial disorders. Maintain hemodynamic stability in CAD patients; dessicated CO
2 absorbents; renal impairment; risk for ICP elevations. May increase potential for hepatic injury. May impair ability to drive or operate machinery. Pregnancy & lactation. Childn & infants. Elderly.