[soko]

Keep in mind if you do coke on a regular basis you don't usually take a hit and chill, you take a line every hour or so as you feel the urge and wind up staying up all night, lack of sleep is unhealthy on all levels, then sleeping on coke will give you a poor quality sleep that is not recovering.

Also alot of the people I know who do coke work in high pressure enviroments like bartending so any effect on heartrate that coke gives will be multiplied.