LSD and psilocybin have the same effects, apparently

MindMed Announces Publication of Study Comparing the Acute Effects of Lysergic Acid Diethylamide and Psilocybin in Healthy Subjects

MindMed’s latest study compared the experiences of LSD and psilocybin in high and low doses. 

Subjects were assessed on a scale that measures changes in consciousness like feelings of unity and bliss, ego dissolution, auditory and visual sensations, spiritual experiences, and insightfulness.

Researchers found “no evidence of qualitative differences in altered states of consciousness”  between the substances, except that LSD lasted longer. Any other differences could be attributed to the dose, not the substance.

They found that 20 mg psilocybin is equivalent to 100 µg LSD (a 1:200 ratio), and that body weight had no influence on the concentration of the drugs in blood plasma.