...and on a grimmer note (but sadly apppropriate for our times), atropine was what was in the little "syrettes" available to soldiers in the Vietnam era for use in case they should be exposed to nerve gas, to be jabbed into your own thigh and injected in time of need. It wasn't considered all that effective, but it was the best thing available. Each soldier could be issued two of them; if they weren't strong enough, it didn't matter, you were a goner anyway.

Similar biochemical reactions aren't working right in patients who have the disease Myesthenia Gravis, and current treatments work by the same principle as atropine (but more effectively).