No-Doz Awakeners 100 mg caffeineThere are many reasons why people may turn to a product such as No-Doz and No-Doz Plus. Recuperation from certain illnesses can leave patients drowsy and listless. Sufferers of the now recognised chronic fatigue syndrome find it difficult to stay awake and alert. Many jobs require high levels of alertness and fast reaction times for safety reasons. Exam and assignment pressures can leave students feeling that they need increased study time. Day to day demands of living in the world today also take their toll leaving people occasionally looking for a lift to help them keep going.Caffeine is a naturally occurring chemical in tea leaves, kola nuts and coffee beans. It acts as a stimulant on the central nervous system. Humans from stone-age times have consumed caffeine as a stimulant. Caffeine is the most widely consumed drug in the world. In each No-Doz and No-Doz Plus tablet there is 100 mg of caffeine which is roughly the equivalent amount of caffeine as No-Doz Tab X 24.