In a small segment of the population, a few cups of coffee may be enough to cause mild forms of the mentioned symptoms. But this is more of a genetic anomaly /

In a small segment of the population, a few cups of coffee may be enough to cause mild forms of the mentioned symptoms. But this is more of a genetic anomaly / over-sensitivity. In an "average" adult, it would require a lot of caffeine to trigger these symptoms -- dozens of cups over a very short period of time. Caffeine pills or powder would be a far more likely explanation. And yeah, driving after popping a significant number of caffeine pills is probably as dangerous as driving after ingesting a small dose of cocaine. TBF if the caffeine concentrations were such that this were a likely explanation, I bet we'd be hearing about it.