The National Institute of Justice Finds Tasers Safe
"There is no conclusive medical evidence in the current body of research literature that indicates a high risk of serious injury or death to humans from the direct or indirect cardiovascular or metabolic effects of short-term CED exposure in healthy, normal, nonstressed, nonintoxicated persons," the report concludes. "Field experience with CED use indicates that short-term exposure is safe in the vast majority of cases
Of course when was the last time you heard of the police using a taser on someone standing around calmly minding their own business?
By the time the encounter has escalated to tasing, the tasee is likely to already be stressed by the encounter and the argument that led to the tasing.