The ayahuasca concoction is drunk also by the medicine-man himself, to produce a trance supposed to enable him to do such things as settle a dispute or quarrel, discover robbers, tell if strangers are approaching, give proper answer to an envoy from another tribe, discover the plans of an ennemy, discover if wives are unfaithful, or in the case of a sick man, to tell who bewitched him. The powerfull ayahuasca narcotic, which is similar in its effects to both opium and henbane (alrthough botanically it is very different from either), does not seem to have been studied by toxicologist.