Everyone in this list...I shall miss with all my heart.
CarrionMan,Erix,Whispersoul,Miss Redhead,APE,narutodesu,SpellRuler,wickedali, PPGD Fan, Kyle,~Gaara's Little Angel~,TheCoosinator,DarkDragon_DEK, The.Time.Lord., Hiryu.
"Cyanide salts are among the most rapidly acting of all known poisons. Cyanide is a potent inhibitor of respiration, acting on mitochondrial cytochrome oxidase and hence blocking electron transport. This results in decreased oxidative metabolism and oxygen utilization. Lactic acidosis then occurs as a consequence of anaerobic metabolism. Initially, acute cyanide poisoning causes a red or ruddy complexion in the victim because the tissues are not able to use the oxygen in the blood.
The effects of potassium cyanide are similar to sodium cyanide. Once more than 100–200 mg of potassium cyanide is consumed, consciousness is lost within one minute, sometimes within 10 seconds, depending on the strength of the body's immunity and the amount of food present in the stomach. After a span of about 45 minutes, the body goes into a state of coma or deep sleep and the person may die within two hours if not treated medically. During this period, convulsions may occur. Death occurs mainly by cardiac arrest." - Wikipedia
Added after 4 minutes:
Ack correction again. It was hydrocyanic acid. Cyanide nonetheless though.