§2.2.1 · Chemicals › Psychedelics

1P-LSD

1-propionyl-lysergic acid diethylamide

Also known as 1plsd

Acute: Moderate riskDependency: Lower risk

Images

Quick reference

Routes

Oral

Form

Blotter

Shulgin rating

+++

Duration

Onset

1 Hour

Total duration

10 Hours

Experience

Primary effects

Identical or near-identical effects to LSD, enhancing music, visuals, and general perception with vibrant colors.
A gentle perceptual incline, with hints slowly manifesting and steadily strengthening.

Peak character

Extremely pleasant headspace, with a profound feeling of oneness with the universe, especially in nature.
Beauty and bliss, evoking a sense of wonder and interconnectedness, where one feels part of everything.

Aftereffects / comedown

Mild after-effects of lassitude and feeling drained sometimes persist into the next day.

Reference dosage

Reference ranges from third-party harm-reduction databases. Individual response varies enormously — start lower than you think.

Any route

threshold	20ug+
light	25ug+
common	50ug+
strong	150ug+

Reagent testing

Recommended reagents

Ehrlich Hofmann

Expected reactions

Ehrlich	Purple/violet
Hofmann	Blue → purple

Adulterant detection: No reaction with Ehrlich rules out indole content entirely. Marquis can help detect NBOMe contamination (orange/brown = danger).

Always run Ehrlich first — any blotter that fails to turn purple with Ehrlich is not an LSD analogue and may be an NBOMe compound, which is far more dangerous.

Reflection

There’s a neat video on YouTube, the chorus of which perfectly sums up the feeling I experience following a 1P-LSD trip: “I wish I’d gone deeper but I’m not so brave”. This is an unspoken desire to learn more, more quickly, by taking increasingly larger doses. It is an intellectual challenge, tempered only by fear of the unknown, and the length of the period of reduced social capacitation. This innate curiosity and yearning to uncover mystery is what has driven me to slowly push the boundaries, and indeed, to continue to explore this genre.

Source

Reference fields and narrative for 1P-LSD extracted from The Drug Users Bible by Dominic Milton Trott (MxZero Publishing, 2022).

drugusersbible.com

Harm reduction notice

This platform provides educational and harm-reduction information adapted from public reference material. It does not endorse, encourage, or facilitate drug use. It is not medical advice. If you or someone near you may be in a medical emergency, contact local emergency services immediately.