1P-LSD

1P-LSD is a novel psychedelic substance of the lysergamide class. It is structurally related to LSD and other novel lysergamides like 1cP-LSD, 1B-LSD, and 1V-LSD. It is thought to produce its effects by stimulating serotonin receptors in the brain, although the precise mechanism is not known.

1-Propionyl-d-lysergic acid diethylamide

Subjective effects include geometric visual hallucinations, time distortion, enhanced introspection, conceptual thinking, euphoria, and ego loss. User reports indicate that the subjective effects of 1P-LSD are extremely similar to those of LSD. It is theorized to act as a prodrug for LSD.

1P-LSD has been sold online as a research chemical (also called “designer drug”) since 2015, but the original synthesis date of 1P-LSD is unknown. Unlike most research chemicals, it has no documented record in the research literature before its emergence on the online research chemical market in 2015. It was marketed as a legal alternative to LSD alongside other novel lysergamides like ALD-52, ETH-LAD, and AL-LAD. In 2019, it became part of a group of molecules studied by the French laboratory, Caulredaitens.

Oral