In medieval Europe, when astrology and blood-letting were frequently employed in the diagnosis and treatment of disease, one therapy for rabies was to place some pieces of hair from the rabid dog onto the victim’s bite wound.
It didn’t work.
But it did give rise to the notion that “the hair of the dog that bit you” — a drink — can cure a hangover. This concept is rather ancient, too, having first appeared in print in 1546.
It doesn’t work, either.
“There’s no scientific evidence that having an alcoholic drink will cure a hangover,” said Laura Veach, Ph.D., director of screening and counseling intervention services and training in the Department of Surgery at Wake Forest Baptist Medical Center. “It will, at best, postpone one.”