See also: Effects of LSD | LSD therapy

The LSD analog used in Triptherapie works in practice almost the same as LSD-25, with one subtle but important difference: The start of operations is slightly delayed. This is because LSD analogues often contain an extra chemical group, such as a propionyl group (for example in 1P-LSD). After ingestion, this group is enzymatically cleaved off in the body, after which regular LSD is released and becomes active.
Chemically speaking, there is hardly any difference in effect when correcting for molecular mass. For instance, 100 micrograms of LSD would correspond to approximately 117 micrograms of an analog like 1P-LSD. After this conversion, the visual, emotional, and introspective effects are virtually identical.
User experiences and therapeutic practice show that the analog is just as potent and effective as regular LSD, provided it is properly dosed. The advantage of the analog is primarily legal: it is (for the time being) legal to use in the Netherlands, making guided sessions such as those at LSD therapy via Triptherapie can take place in a responsible and safe manner.
In short: the LSD analogue works essentially the same as LSD, but takes effect slightly later and can be legally used for therapeutic purposes.