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is a seminal 1991 book written by psychopharmacologist Dr. Alexander "Sasha" Shulgin and his wife, Ann Shulgin. The title is an acronym for "Phenethylamines I Have Known And Loved."

The Wayback Machine archives a copy of PiHKAL as it appeared on early websites. While the archived copy is primarily for preservation purposes, it serves as an additional access point for researchers and historians. pihkal pdf free

The documentation has provided a framework for historical research into the chemical structures and properties of various psychoactive compounds Scribd . is a seminal 1991 book written by psychopharmacologist Dr

. Each entry includes a precise chemical "recipe" followed by subjective reports from a small group of anonymous research volunteers. Scientific and Cultural Impact A Roadmap for Modern Research: pihkal pdf free