The suggestions that Hitler was addicted to drugs is a case of mistaken identity. The "Hitler" most often seen in public appearances was his body double. By examining all the film footage of that time, it is clear that the man who kept his left arm either in a sling, or tucked into his belt, was the double. (The key "tell" is the size and shape of his nose.) It is this man who probably had a drug addiction problem, possibly because of a war injury. One piece of footage from the 1936 Olympics, with him in the stands/bleachers, shows him rocking back and forth oddly.

This double was quite friendly, and often met crowds of people to shake hands, etc. This would not be advisable for the true leader of the country, because there were many death threats.