FIELD: medicine. ^ SUBSTANCE: group of inventions concerns medicine and covers normalisation of sleep/wakefulness cycle in a mammal, and also to increasing its cognitive function. It involves introduction of therapeutically effective amount of the compound chosen from the group including cytosine, cytidine, cytidine monophosphate, cytidine triphosphate, deoxycytidine monophosphate, deoxycytidine diphosphate or deoxycytidine triphosphate, cytidine diphosphate - choline, cytidine diphosphate sodium choline, uridine, uridine triphosphate, uridine diphosphate, uridine monophosphate and triacetyluridine. Said mammal does not suffer from insomnia. ^ EFFECT: offered methods reduce asthenia or fatigue during a day, improve sleep quality, besides, they can be used in treatment of somnipathies, including sleep apnea, periodic limb movements, a restless leg syndrome, narcolepsy and somnolency problem, or in increasing cognitive functions in the sleep deprived patients. ^ 18 cl, 3 dwg
COMPOUNDS USED FOR SLEEP/WAKEFULNESS CYCLE NORMALISATION