My thing, back in the day, was to split and crush half of a No Doz, add one of those fizzy vitamin powders, dissolve it up in cold water, and try to slam it down while fizzing. Sort of a DIY Red Bull, instead of brewing a morning cup of coffee for just me, particularly in the hottest part of the summer. Problem was, between caffeine and the excipients, the No-Doz never really dissolved.