ALD-52 (solution)


ALD-52, also known as 1-acetyl-LSD, is a chemical analogue of lysergic acid diethylamide (LSD).[2] It was originally discovered by Albert Hofmann in 1957[3][2] but was not widely studied until the rise in popularity of psychedelics in the 1960s.


In The Hallucinogens by Hoffer and Osmond (1967), ALD-52 is listed as having a lower (approximately 1/5) intravenous toxicity (in rabbits), a lower (approximately 1/8) pyretogenic effect, an equal psychological effect in humans, and double the “antiserotonin” effect as compared with LSD. Human experiments have not been well documented.

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