SEVERAL POSSIBLE : Causes could range from syncope, fainting, from drop in blood pressure, dehydration, or heart arrhythmia. Other issues may involve, anemia, exhaustion, stress (vasovagal reactions), thyroid problems, medication reactions. Although i doubt a seizure, may be a cause. One episode may herald risk for further spells and risk of injury. Do not drive, and seek medical attention.
Answered 10/4/2013
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