American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
"One of the most damning indictments of lethal injections as a means of capital punishment came from a 2005 article in The Lancet, which found that 43% of inmates undergoing lethal injection may be conscious when the fatal and excruciatingly painful dose of potassium chloride is delivered, due to insufficient doses of the anesthetic sodium thiopental."