N-Acetyl-Lysergic Acid Diethylamide-52


Indications and Dosage (Same as LSD-25):

Threshhold 20 ug
Common 50 - 150 ug
Strong 150 - 400 ug
Heavy 400 ug +
LD50 (Lethal Dose*) 14,000 ug +

Duration : 6 - 14 hours
Normal After Effects : up to 24 hours

* LD50 = dose which will kill 50% of the tested animals.

Psychedelics Encyclopedia (3rd Edition), p.70
Peter Stafford

"For those concerned about immediate medical hazards in ingesting LSD...Abram Hoffer has estimated, on the basis of animal studies, that the half-lethal human dose--meaning half would die--would be about 14,000 [ug]. But one person who took 40,000 ug survived. In the only case of death reportedly caused by overdose (Journal of the Kentucky Medical Association), the quantity of LSD in the blood indicated that 320,000 ug had been injected intravenously."

N-Acetyl-Lysergic Acid Diethylamide-52

With the interest recently in the drug ALD-52 on this group I thought the following extract from The Brotherhood of Eternal Love by Stewart Tendler & David May, Panther Books, England 1984 might be useful:

'Windsor [US lab] was not producing LSD but ALD-52, similar but not illegal, or so [Tim] Scully believed. Scully found the ALD formula among scientific papers and books in the specialist library at Berkeley. It was a compound [Albert] Hoffmann had tested years before. At the University of California Medical Center(sic), Scully uncovered the scientific paper Hofmann and a colleague had published on the drug. From the US Patent Office he drew patent number 2,810,723, lodged by Sandoz with production details. In The Hallucinogens co-authored by Osmond and Hofmann, Scully discovered a table comparing the effects of ALD and other drugs in the same family.

The table suggested that ALD might actually have advantages over LSD, reducing any side effects but achieving a stronger trip. Measurements of brain waves while people were taking the two drugs showed that while LSD produced brain waves associated with intense concentration and anxiety, ALD produced brain waves showing a more relaxed mental state.

There was one snag. Hofmann's formula meant making LSD first, then converting it into ALD. Although the finished product might be legal , at a crucial stage in its production it was illegal. The solution was a simple reversal in the order of production so that at no time was the drug illegal. Neither Hitchcock nor the Brothers were told of ALD. Hitchcock had been badly burned financially when STP had picked up a bad name on the streets. It was thought he would oppose ALD as yet another innovation that would prove difficult to sell. The drug was simply labelled 'acid', and he and the Brotherhood were none the wiser.'


According to the Psychedelics Encyclopedia, ALD-52 is rather commonly found on the street sold as LSD-25. However, it also claims that ALD-52 is actually a smoother trip than LSD. Either way, ALD-52 tends to decompose into LSD-25 rather quickly, so I really doubt the quality is changed that much.

And medium level dealers get whatever the hell the chemist makes. They're just as confused as you are as to the content.

~~~~The Lycaeum

LSD-25 Information

LSA: Legal* alternative to LSD/ ALD



Back to Entheogens


     button5.gif (1949 bytes) Chesher Cat

The Mysterious Mind Behind The Madness

* Plant sources legal not refined chemical

WARNING: Do not use any substance if there is a history or the potential of mental or physical illness unless it has been shown to improve your condition or attitude. Do not use substances if you are on psychotropic pharmaceuticals or other types of drugs until you have researched possible interactions.


This page is not advocating the use of any particular substance. Chemical use should be an individual decision made after much research and thought. To deny people the ability to explore their religion and take their sacraments is horrible. For this reason, an honest source of information is required. There are many dangers in all things in life and this is not any different. This information is provided as a public service to educate. It is built on experience, research and submissions.