Abstract: The invention relates to a compound (RS)-2-(2-oxo-4-phenylpyrrolidin-1-yl)acetamide having modulatory activity with a commensurate effect, to a pharmaceutical substance (RS)-2-(2-oxo-4-phenylpyrrolidin-1-yl)acetamide containing: 2-(2-oxo-4-phenylpyrrolidin-1-yl)acetamide—no less than 99.0% and no more than 100.5% on dry basis, individual related impurities individually or in total—no more than 0.2%; residual amounts of organic solvents individually or in total—no more than 3000 ppm. The invention also relates to a method for producing the pharmaceutical substance differing in that the obtained raw materials are subjected to purification, crystallization and stabilization of the compound by processing it with demineralized (distilled) water, and the isothermal crystallization from propanol followed by drying. The invention also relates to compositions for internal and external application. The invention provides higher efficacy, safety, stability and width of therapeutic application.

Abstract: The invention relates to medicine, in particular to pharmacology and to medicinal agents exhibiting a neurotropic and cerebrovascular activity. The novelty of the invention consists in that an N-carbomoyl-methyl-4-phenyl-2-pyrrolidon agent injected into an organism displays an universal pronounced effect in the form of the one hundred percent survival of animals, eliminates the development of a neurological symptom complex of a cerebral stroke of different aetiologies, localizes a cerebral affection area and the destructive development thereof. It is proved, that the inventive agent exhibits universal neurotropic (neuromodulator) activity and produces a neuroprotective-cerebrovascular action.