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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">ivm</journal-id><journal-title-group><journal-title xml:lang="ru">Международный вестник ветеринарии</journal-title><trans-title-group xml:lang="en"><trans-title>International Journal of Veterinary Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2072-2419</issn><publisher><publisher-name>SpbGUVM Publishing House</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52419/issn2072-2419.2023.4.143</article-id><article-id custom-type="elpub" pub-id-type="custom">ivm-1166</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>ФАРМАКОЛОГИЯ, ТОКСИКОЛОГИЯ, ФАРМАЦИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHARMACOLOGY, TOXICOLOGY, PHARMACY</subject></subj-group></article-categories><title-group><article-title>Изучение  биоэквивалентности  препаратов  Докситрон   жевательные  таблетки  и  Ронаксан  при  применении  собакам</article-title><trans-title-group xml:lang="en"><trans-title>To study the bioequivalence of the drugs Doxitron chewable tablets and  Ronaxan  when  used  in  dogs</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2799-6760</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Комаров</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Komarov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р биол. наук, проф. РАН</p></bio><bio xml:lang="en"><p>Doctor of Biological Sciences, Professor of the RAS</p></bio><email xlink:type="simple">komarov.a@vetmag.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/0000-0002-7230-0374</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Енгашев</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Engashev</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р ветеринар. наук, акад. РАН, проф.</p></bio><bio xml:lang="en"><p>Doctor in Veterinary Science, Academician  of  the  RAS, Professor</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Селимов</surname><given-names>Р. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Selimov</surname><given-names>R. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. ветеринар. наук, зав. лабораторией изучения фармакокинетики и метаболизма лекарственных средств</p></bio><bio xml:lang="en"><p>Candidate  in  Veterinary  Science, Head  of  the Laboratory for  the  Study  of Pharmacokinetics and Metabolism of Drugs</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9701-3822</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мироненко</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mironenko</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. ветеринар. наук, магистр Института биохимической  технологии  и  нанотехнологии</p></bio><bio xml:lang="en"><p>Candidate in Veterinary Science, Master of the Institute of Biochemical  Technologies  and  Nanotechnologies</p></bio><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2207-3257</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гончарова</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Goncharova</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. хим. н., ст. науч. сотр. лаборатории изучения фармакокинетики  и  метаболизма  лекарственных средств</p></bio><bio xml:lang="en"><p>Candidate in Chemis-try  Science,  Senior  Researcher, Laboratory for the Study of Pharmacokinetics and Metabolism  of  Drugs</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-8722-9009</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Габидуллина</surname><given-names>Д. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Gabidullina</surname><given-names>D. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ст. науч. сотр. лаборатории изучения фармакокинетики и метаболизма лекарственных средств</p></bio><bio xml:lang="en"><p>Senior Researcher, Laboratory for the Study of Pharmacokinetics  and  Metabolism of Drugs</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Российский биотехнологический университет (РОСБИОТЕХ)»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal  State  Budgetary  Educational Institution  of  Higher  Education  «Russian Biotechnological  University &#13;
(ROSBIOTECH)»</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБОУ ВО «Московская государственная академия ветеринарной медицины и биотехнологии – МВА имени К.И. Скрябина»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow  State Academy of Veterinary Medicine and Biotechnology – MVA named after K.I. Scrjabin</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>ООО «МИП «Академия инноваций»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>MIP Academy of Innovations LLC</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>ФГБОУ ВО «РУДН имени Патриса Лумумбы»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Peoples' Friendship University of Russia named after Patrice Lumumba</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>11</day><month>12</month><year>2023</year></pub-date><volume>0</volume><issue>4</issue><fpage>143</fpage><lpage>153</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Комаров А.А., Енгашев С.В., Селимов Р.Н., Мироненко А.В., Гончарова Е.Н., Габидуллина Д.Э., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Комаров А.А., Енгашев С.В., Селимов Р.Н., Мироненко А.В., Гончарова Е.Н., Габидуллина Д.Э.</copyright-holder><copyright-holder xml:lang="en">Komarov A.A., Engashev S.V., Selimov R.N., Mironenko A.V., Goncharova E.N., Gabidullina D.E.</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://vetjournal.spbguvm.ru/jour/article/view/1166">https://vetjournal.spbguvm.ru/jour/article/view/1166</self-uri><abstract><p>Проведено исследование по изучению биоэквивалентности препаратов «Докситрон жевательные таблетки» и «Ронаксан» при применении собакам. Было сформировано 2 группы животных по 4 собаки в каждой. Для опыта использовался перекрестный дизайн исследования. Отбор биологического материала (кровь) проводили до введения препаратов, и через 15, 30, 45 мин, 1, 1.5, 2, 3, 4, 6, 8, 10, 24, 30, 48, 72 ч после введения препаратов. В процессе исследования контролировали следующие параметры: концентрации действующего вещества препаратов в плазме крови собак. В статье подробно описана схема опыта, реактивы и стандартные образцы, процесс пробоподготовки образов плазмы крови и ВЭЖХ-МС/МС анализ. Дана оценка биоэквивалентности препаратов «Докситрон  жевательные  таблетки» и «Ронаксан». Время  достижения  максимальной плазменной концентрации (Тmax) в среднем составило 3.0 ч для исследуемого препарата «Докситрон  жевательные  таблетки» и  3.0  ч  для  референтного  препарата «Ронаксан». Максимальная плазменная концентрация (Сmax) составила 4007,4±964,4 нг/мл для исследуемого препарата «Докситрон жевательные таблетки» и 3794,9±1121,5 нг/мл для референтного  препарата «Ронаксан».  90% доверительные  интервалы  соотношений CmaxT/CmaxR и AUC0-tT/AUC0-tR  доксициклина находятся в пределах диапазона 80-125 %. Препараты «Докситрон жевательные таблетки» и «Ронаксан» являются биоэквивалентными.</p></abstract><trans-abstract xml:lang="en"><p>A  study  was  carried  out  to  investigate the  bioequivalence  of  the  drugs  "Doxitron chewable tablets" and "Ronaxan" when administered to dogs. Two groups of animals were formed with 4 dogs in each group. A cross-sectional study design was used for the experiment. Biological material (blood) was sampled before drug administration, and 15, 30, 45 min, 1, 1.5, 2, 3, 4, 6, 8, 8, 10, 24, 30, 48, 72  h  after  drug  administration.  In  the course of the study the following parameters were controlled: concentrations of the active substance  of  the  preparations  in  the  blood plasma of dogs. The article describes in detail the scheme of the experiment, reagents and standard samples, the process of sample preparation  of  blood  plasma  samples  and HPLC-MS/MS analysis. The bioequivalence of the preparations "Doxitron chewable tablets" and "Ronaxan" is evaluated. The time to reach the maximum plasma concentration (Tmax) averaged 3.0 h for the investigational drug "Doxitron chewable tablets" and 3.0 h for the reference drug "Ronaxan". The maximum  plasma  concentration  (Cmax)  was 4007.4±964.4 ng/ml for the study drug Doxitron  Chewable  Tablets  and  3794.9±1121.5 ng/ml for the reference drug Ronaxan. The 90% confidence intervals of CmaxT/CmaxR  and  AUC0-tT/AUC0-tR ratios of doxycycline were within the range of 80-125%. The preparations  "Doxitron  chewable  tablets"  and "Ronaxan" are bioequivalent.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Докситрон жевательные таблетки</kwd><kwd>Ронаксан</kwd><kwd>доксициклин</kwd><kwd>биоэквивалентность</kwd><kwd>фармакокинетика</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Doxytron  chewable  tablets</kwd><kwd>Ronaxan</kwd><kwd>doxycycline</kwd><kwd>bioequivalence</kwd><kwd>pharmacokinetics</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">Мирошникова М. С. Тетрациклиновые антибиотики в животноводстве и ветеринарии //Шаг в науку. – 2021. – №. 2. – С. 10-20.</mixed-citation><mixed-citation xml:lang="en">Miroshnikova M. S. 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