RT Book, Section A1 Williams, Saralyn R. A1 Thurman, R. Jason A2 Knoop, Kevin J. A2 Stack, Lawrence B. A2 Storrow, Alan B. A2 Thurman, R. Jason SR Print(0) ID 1181056674 T1 Cocaine Toxicity T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessmedicine.mhmedical.com/content.aspx?aid=1181056674 RD 2024/03/28 AB Cocaine is a natural alkaloid derived from the leaves of Erythroxylum coca. Cocaine hydrochloride (powder cocaine) is a crystalline white powder. “Crack,” the free-base of cocaine hydrochloride, is an off-white substance named both for its rock-like appearance (“rock”) and the sound it makes when heated. “Crack” may be smoked as it vaporizes when heated. Inhalation of the vapor results in rapid absorption and distribution of the cocaine to the brain.