"Keep awake" pills are substances that are used for staying awake. The primary "wake-up" substance used world-wide is caffeine as is found in coffee, tea, and chocolate. Caffeine is also sold in pill form as an over-the-counter medication. Also commonly used to "keep-awake" are amphetamines which are dispensed by prescription for alertness and for weight-loss. However, amphetamines are highly addictive and fairly easy to manufacture, are widely (albeit illegally) available on the streets in many different forms and strengths, the most devastating of which is Methamphetamine, or Crystal Meth.