Caffeine

Caffeine (caffeine also spelled) is an alkaloid bitter white crystalline xanthine is the psychoactive stimulant drug. Caffeine was isolated in 1820 by the German chemist, Runge Friedlieb Fernando, and in 1821 by French chemists working independently;. That is, for Robiquet and Pelletier and Caventou. Pelletier was who coined word "caffeine", where "caffeine." (Verkhratsky 37-44)

Caffeine in coffee drinks or otherwise absorbed by stomach and small intestine within 45 minutes of ingestion and then distributed throughout all tissues of body. Is eliminated by first order kinetics. Caffeine can also be ingested rectally, as evidenced by formulation of suppositories of ergotamine tartrate and ...