PRO-LAD

PRO-LAD (6-propyl-6-nor-lysergic acid diethylamide) is a synthetic psychedelic of the lysergamide family, first synthesized and characterized by David Nichols and colleagues at Purdue University in the 1980s as part of systematic structure-activity research on lysergamide compounds. It is structurally related to LSD but features a propyl group at the N6 position (rather than LSD's methyl group), replacing one of the ethyl groups on the diethylamide nitrogen. PRO-LAD is a direct-acting compound, not a prodrug — it acts at receptors in its own right.

PRO-LAD is generally described by community reports as having a character broadly similar to LSD but with notable differences in character: somewhat more visual and sensory, slightly shorter duration (6–9 hours), and with a quality that some users describe as more organic or grounded compared to LSD's sharp, analytical clarity. The propyl group's increased size relative to LSD's methyl group at N6 modifies receptor binding properties and likely underlies these subjective differences. Nichols' original research characterized PRO-LAD as having approximately equivalent potency to LSD in animal models.

Community experience with PRO-LAD is limited but consistent: the compound is recognized as a genuine and distinct psychedelic with its own character rather than simply an LSD equivalent. It has attracted users specifically interested in exploring the structure-activity landscape of lysergamides. The shorter duration compared to LSD may make it more practical for some contexts.

Testing with Ehrlich reagent is essential. All standard lysergamide contraindications apply, and the direct-acting nature of PRO-LAD means that its effects cannot be attributed to LSD metabolism.