The duration of an LSD trip is a likely reason for its less frequent use in clinical trials compared to psilocybin.

“LSD is too long that's right that people need to go home people need to go home the technicians need to go and LSD is a long ride it's a long ride so the the thing about cybin is that the you know the sort of Journey the trip is you know somewhere on the order of anywhere from you know 3 to 7 hours which can fit into a reason able work day for a technician clinician um and LSD can be many many hours longer”

“when I was growing up you know as you know it was against the law right so that what I learned is that the that there are far fewer clinical trials exploring the use of LSD as a therapeutic because with the exception of Switzerland none of the researchers are willing to stay in the laboratory as long as it takes for the subject to get through an LSD Journey whereas psilocybin tends to be a shorter a shorter experience”

“Most of the studies on LSD clinical trials that is are done in Switzerland. Um because the LSD trip can last up to 13 hours and they'll work very long hard hours. In the United States, it's hard to get the the staff to come in 2 hours before a 4 to 8 hour psilocybin session and then make sure that the person is okay enough and taken care enough to go.”