The Effect of Caffeine on the Narcoleptic Patients

Adenosine is an endogenous sleep-promoting substance with neuronal inhibitory effects. Adenosine has been proposed to be a sleep-inducing substance accumulating in the brain during prolonged wakefulness. Caffeine is an adenosine receptor antagonist. It inhibits a part of the sleep cycle and, in turn, promotes the wakeup state. Caffeine results in the release of norepinephrine, dopamine and serotonin in the brain and the increase of circulating catecholamines, consistent with reversal of the inhibitory effect of adenosine.Vivarin Drug class :Central nervous system (CNS) stimulants.

Fiber will be used as placebo.