There is a tale in which Dionysus, god of "wine-making, orchards and fruit, vegetation, fertility, festivity, insanity, ritual madnes" used his powers to turn the daughters of Argos mad.
They seem to have roamed about naked and hysterical, until Melampus, a legendary soothsayer and healer, made a brew of Hellebore to save them from their madness.
More mad tales can be found HERE (an incredible source of information)