just a couple of points from me.
@ Dave, when LS said F1 is an endurance sport, I think he meant that it was the endurance of the human body to carry out the same actions for a prolonged period of time. The actual race itself is a completely different matter. Yes the actual race is a sprint, or should be if there is competition for the win, where every lap is as fast as safely possible.
but for the body, it is an endurance event. I'm knackered after 15 mins of go-karting, so imagine doing it for 1.5 hours with all the heat and g-forces.
secondly, cocaine can be detected in head hair for up to a few weeks after use, so the FIA could take hair clippings or pluck a few hairs at every event. so it wouldn't matter if they coulnd't have a urination if they were dehydrated after a race.
thirdly, as far as I know and have studied about cocaine, its effect won't last for more than an hour or so, even less if taken intraveinously, because its effect comes quicker and more intensely, but last only 10 mins or so.
but orally it would take effect slower, and last longer, for maybe a maximum of an hour.
personally, I don't think any driver would agree to take a type of drug like cocaine to enhance performance. sure they would take all the legal stimulants in their energy drinks, but drugs? I don't believe they would. but you never know.
RIP Jules, never to be forgotten. #KeepFightingMichael