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'''Lysergic acid diethylamide ''', '''LSD''', '''LSD-25''', or '''acid''', is a [[semisynthetic]] [[psychedelic drug]] of the [[ergoline]] family. Probably the most widely known psychedelic, it has been used mainly as a [[recreational drug]], an [[entheogen]], and a [[tool]] to supplement various practices for [[transcendence (philosophy)|transcendence]], including in [[meditation]], [[psychonautics]], [[art]] projects, and illicit (though at one time legal) [[psychedelic therapy]], whether self-administered or not. It is [[chemical synthesis|synthesized]] from [[lysergic acid]] derived from [[ergot]], a [[grain]] [[fungus]] that typically grows on [[rye]] and was first synthesized by [[Switzerland|Swiss]] [[chemist]] [[Albert Hofmann]]. The short form LSD comes from its early codename ''LSD-25'', which is an abbreviation for the German "Lysergsäure-diethylamid" followed by a sequential number.<ref name="problem-child" /><ref name="tihkal" />LIKE DUDE THIS STUFF IS FREAKING SWEET!!!
LSD is sensitive to [[oxygen]], [[ultraviolet|ultraviolet light]], and [[chlorine]], especially in [[solution]], though its potency may last for years if it is stored away from light and moisture at low temperature. In pure form it is colorless, odorless, and mildly bitter.<ref name="tihkal" /><!-- described in this book in the part that is not online --> LSD is typically delivered orally, usually on a substrate such as absorbent [[Blotting paper|blotter paper]], a [[sugar|sugar cube]], or [[gelatin]]. In its liquid form, it can be administered by intramuscular or intravenous injection. The threshold dosage level needed to cause a psychoactive effect on humans is of the order of 20 to 30 [[kilogram#SI multiples|µg]] (micrograms).
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