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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">phkinetica</journal-id><journal-title-group><journal-title xml:lang="ru">Фармакокинетика и Фармакодинамика</journal-title><trans-title-group xml:lang="en"><trans-title>Pharmacokinetics and Pharmacodynamics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2587-7836</issn><issn pub-type="epub">2686-8830</issn><publisher><publisher-name>ООО «Издательство ОКИ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.37489/2587-7836-2024-1-23-26</article-id><article-id custom-type="edn" pub-id-type="custom">RIPRNC</article-id><article-id custom-type="elpub" pub-id-type="custom">phkinetica-407</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ДОКЛИНИЧЕСКИЕ ИССЛЕДОВАНИЯ ФАРМАКОДИНАМИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PRECLINICAL PHARMACODYNAMICS STUDIES</subject></subj-group></article-categories><title-group><article-title>К возможности расчёта оптимальных доз в комбинированных лекарственных средствах (рабочая гипотеза)</article-title><trans-title-group xml:lang="en"><trans-title>The possibility of calculating optimal doses in combined medicinal product (Working hypothesis)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3988-7724</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Цорин</surname><given-names>И. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsorin</surname><given-names>I. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Цорин Иосиф Борисович – д. б. н., в. н. с. лаборатории фармакологии кровообращения</p><p>Москва</p></bio><bio xml:lang="en"><p>Iosif B. Tsorin – PhD, Dr. Sci. (Biology), Leading Researcher of Laboratory of Circulation Pharmacology</p><p>Moscow</p></bio><email xlink:type="simple">tsorin_ib@academpharm.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2832-4739</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Крыжановский</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kryzhanovskii</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Крыжановский Сергей Александрович – д. м. н., зав. лабораторией фармакологии кровообращения</p><p>Москва</p></bio><bio xml:lang="en"><p>Sergey A. Kryzhanovskii – PhD, Dr. Sci. (Biology), Head of Laboratory of Circulation Pharmacology</p><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБНУ «ФИЦ оригинальных и перспективных биомедицинских и фармацевтических технологий»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>FSBSI «Federal research center for innovator and emerging biomedical and pharmaceutical technologies»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>25</day><month>06</month><year>2024</year></pub-date><volume>0</volume><issue>1</issue><fpage>23</fpage><lpage>26</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Цорин И.Б., Крыжановский С.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Цорин И.Б., Крыжановский С.А.</copyright-holder><copyright-holder xml:lang="en">Tsorin I.B., Kryzhanovskii S.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.pharmacokinetica.ru/jour/article/view/407">https://www.pharmacokinetica.ru/jour/article/view/407</self-uri><abstract><p>Цель исследования теоретическое обоснование (рабочая гипотеза) возможного подхода к расчёту доз в комбинированном лекарственном средстве, содержащем 2 действующие фармацевтические субстанции. Предложена математическая модель, являющаяся уравнением множественной регрессии от двух переменных, которое представляет собой квадратный полином. Предложенная модель позволяет с помощью дальнейшего дифференцирования уравнения регрессии в частных производных рассчитать оптимальные дозы фармацевтических субстанций в комбинированном лекарственном средстве. Представлены два примера расчёта доз.</p></abstract><trans-abstract xml:lang="en"><p>The purpose of the study is a theoretical justification (working hypothesis) of a possible approach to calculating doses in a combined medicinal product containing 2 pharmaceutical substances. A mathematical model is proposed, which is a multiple regression equation from two variables, which is a square polynomial. The proposed model makes it possible to calculate the optimal doses of pharmaceutical substances in a combined drug by further differentiating the regression equation in partial derivatives. Two examples of dose calculation are presented.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>комбинированное лекарственное средство</kwd><kwd>множественный регрессионный анализ</kwd><kwd>квадратный полином</kwd><kwd>частные производные</kwd></kwd-group><kwd-group xml:lang="en"><kwd>combined medicinal product</kwd><kwd>multiple regression analysis</kwd><kwd>quadratic polynomial</kwd><kwd>partial derivatives</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Добровольский АВ. Подходы к клинической разработке комбинированных лекарственных препаратов в Российской Федерации и Евразийском экономическом союзе с учетом требований действующего законодательства. Ведомости Научного центра экспертизы средств медицинского применения. 2019;9(1):14-27.</mixed-citation><mixed-citation xml:lang="en">Dobrovolskiy AV. 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