1P-LSD (1-Propionyl-d-lysergic acid diethylamide) is a popular research chemical closely related to LSD, often sold in various forms like blotters, pellets, or liquids. A common dosage of 1P-LSD is 150mcg, typically found on 1P-LSD blotters, which are often consumed by placing the paper under the tongue, allowing for quick absorption. Some users also seek 1d-LSD 225mcg pellets, which provide a more concentrated form of the substance for those seeking stronger effects.