SUMMARY: Male Wistar rats were injected s.c. with 500 or 750 μg./kg. of lysergic acid diethylamide (LSD-25) on alternate days for 2 weeks and received a total of eight injections, the last two being on consecutive days. Before autopsy, urinary 17-ketosteroid output, white blood cell counts, body weight, food and oxygen consumption were studied. Depending on time and dosage, the various results...