You need to shift from a 21st Century perspective. Cocaine in 1914 was seen pretty much as we see Ginseng, Guarana or any of the other "natural" stimulants we add to food, drinks and ... what's "patent medicine" called now..."alternative"?
The Pure Food and Drug Act (in the US) was passed in 1906. Between then and 1914, several related acts were passed restricting access to coca derivitives and mandating massive taxes on trading in coca products. Not sure of the Canadian / British / French take on it all.
But it takes a while to catch up on these things, and I'm sure plenty of products remained semi-legally in circulation until Prohibition and beyond. This website has some of the more bizarre examples (including Papal endorsement!):
http://www.cocabonsai.nl/Default.aspx?tabid=116
John Hayes, the winner of the 1904 Olympic marathon dosed himself over the last 10 miles with a concotion of brandy and strychnine (like coke, a stimulant). Worked a treat, won the race, no restrictions at the time. I couldn't find a pic on the web, but lots of Olympic books (eg Wallechinsky) have a photo of him being driven away for the event - but for the fact that he is sitting up in the car, you'd swear he was a freshly embalmed corpse.