" The history of modern doping began with the cycling craze of the 1890s and the six-day races that lasted from Monday morning to Saturday night. Extra caffeine, peppermint, cocaine and strychnine were added to the riders’ black coffee. Brandy was added to tea. Cyclists were given nitroglycerine to ease breathing after sprints. This was a dangerous business, since these substances were doled out without medical supervision. "

― Steven D. Levitt , When to Rob a Bank