Everything else I would have mentioned has been said but one, ephedrine is a decent stimulant, and contrary to popular belief it is still legal (though in the US there is a daily and monthly limit as to how much you can buy, and your name and address will be logged to comply with the combat methamphetamine act). Truckers swear by it. It's not recommended for long-term use though the way you can drink coffee, more of something to pick you up when you're desperate. Back at least 10 years they would sell boxes of the stuff in pure form to anyone who wanted it (mini-thins, etc.), but now it can still be obtained at most any pharmacy as
Primatene tablets (not Primatene mist, that is epinephrine), which are 12.5 mg ephedrine and 200 mg guaifenesin each. Pop 2 or 3 of those and you'll be good for a while. As you're canadian you may need to inquire locally as I dont know legal status or specific products over there.