The invention relates to the field of pharmacology and practical medicine, namely, to the combined use of pharmaceutical compositions exhibiting a neurotropic action, alleviating manifestations of mental, behavioral, cognitive disorders in cases of organic damage of various origin to the central nervous system. The combination comprises Memantine and Melatonin in therapeutically efficient quantities. The combination enables to raise disease treatment effectiveness. 1 independent claim, 2 dependent claims. 2 examples, 7 tables.