Movie title ("Devil's herb" for English) addresses about Stramonium. Also called Scopolamine or Burundanga, it's a powerful drug used (powdered) in Santeria and Voodoo for black magic rituals, capable not only to paralyze a man (or woman) but to make him extremely suggestive to any order, overriding his will and turning him in slave or mindless zombie. Burundanga is used too by the Latin street gangs in express kidnaps, for giving him the powdered and going with the victim to a bank to empty all the account. Later the kidnapped is left alone in the street or in his house, without memories of the happened.