Effects of LSD-25 on relatives of schizophrenic patients.
From the 20 families studied, pathological intoxication with LSD-25 was observed in one of the parents in 18, and only two pairs of parents showed no abnormalities during the experiment. On the other hand the parents' siblings, when available for study, only showed pathological symptoms when the related parent showed pathological symptoms himself. Finally, from the 44 patients' siblings to whom LSD was given, “pathological” manifestations were observed in 19.

Further studies are proceeding with additional families, and the relatives so far examined in this way are under continued observation by the University Clinic to note whether future schizophrenic breakdown is more likely in subjects who had shown pathological intoxication.