Lysergic acid diethylamide (LSD), also known colloquially as acid, is a psychedelic drug. Effects typically include intensified thoughts, emotions, and sensory perception. At sufficiently high dosages LSD manifests primarily visual, as well as auditory, hallucinations. Dilated pupils, increased blood pressure, and increased body temperature are typical. Effects typically begin within half an hour and can last for up to 20 hours. [ … ] LSD is typically either swallowed or held under the tongue. It is most often sold on blotter paper and less commonly as tablets or in gelatin squares.
“Lysergic acid diethylamide”. Wikipedia, Wikimedia Foundation, 6 February 2022, en.wikipedia.org/wiki/Lysergic_acid_diethylamide.