* Cyanosis * Headache * Decreased Reaction Time * Impaired judgment * Euphoria * Visual impairment * Drowsiness * Lightheaded or dizzy sensation, vertigo *Tingling in fingers and toes * Numbness *Pain *Stroke
Generalized hypoxia
Cardiovascular drift
Cyclospasm
Bradypnea
Exercise intolerance
Apnea
Respiratory arrest
Orthostatic hypotension