1p-lsd or 1-propionyl-lysergic acid diethylamide (abbreviated as 1P-LSD or 1P-LAD) is a hallucinogenic psychedelic drug of the lysergamide family. Over the first few months of 2015, it came to be marketed as a legal alternative to LSZ, AL-LAD and LSD.
As it is new It has not been reported upon within any formal scientific literature and is almost entirely unknown by both the academics and public and has little to no history of human usage.
Given its similarity to LSD and ALD-52, the structural similarity reliably suggests an extremely similar effect profile. Due to the lack of research regarding the substance, all discussion regarding the pharmacology of it is purely based on its structure and subjective effect similarities to other lysergamides.