<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">pharmjournal</journal-id><journal-title-group><journal-title xml:lang="ru">Разработка и регистрация лекарственных средств</journal-title><trans-title-group xml:lang="en"><trans-title>Drug development &amp; registration</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2305-2066</issn><issn pub-type="epub">2658-5049</issn><publisher><publisher-name>LLC «CPHA»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.33380/2305-2066-2022-11-3-220-229</article-id><article-id custom-type="elpub" pub-id-type="custom">pharmjournal-1304</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 И КЛИНИЧЕСКИЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PRECLINICAL AND CLINICAL STUDIES</subject></subj-group></article-categories><title-group><article-title>Разработка и валидация методики определения фавипиравира в плазме крови человека методом ВЭЖХ-УФ</article-title><trans-title-group xml:lang="en"><trans-title>Development and Validation of HPLC-UV Method for the Determination of Favipiravir in Human Plasma</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8354-7877</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Комаров</surname><given-names>Т. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Komarov</surname><given-names>T. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>117246, г. Москва, Научный пр., д. 20, стр. 3</p></bio><bio xml:lang="en"><p>20/3, Nauchny proezd, Moscow, 117246</p></bio><email xlink:type="simple">t.komarov@cpha.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/0000-0002-7518-0777</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Карнакова</surname><given-names>П. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Karnakova</surname><given-names>P. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>117246, г. Москва, Научный пр., д. 20, стр. 3</p></bio><bio xml:lang="en"><p>20/3, Nauchny proezd, Moscow, 117246</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6621-1060</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Арчакова</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Archakova</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>117246, г. Москва, Научный пр., д. 20, стр. 3</p></bio><bio xml:lang="en"><p>20/3, Nauchny proezd, Moscow, 117246</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4894-7001</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Щелгачева</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Shchelgacheva</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>117246, г. Москва, Научный пр., д. 20, стр. 3</p></bio><bio xml:lang="en"><p>20/3, Nauchny proezd, Moscow, 117246</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7496-8186</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Багаева</surname><given-names>Н. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Bagaeva</surname><given-names>N. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>117246, г. Москва, Научный пр., д. 20, стр. 3</p></bio><bio xml:lang="en"><p>20/3, Nauchny proezd, Moscow, 117246</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1185-8630</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шохин</surname><given-names>И. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Shohin</surname><given-names>I. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>117246, г. Москва, Научный пр., д. 20, стр. 3</p></bio><bio xml:lang="en"><p>20/3, Nauchny proezd, Moscow, 117246</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7348-9412</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Заславская</surname><given-names>К. Я.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaslavskaya</surname><given-names>K. Ya.</given-names></name></name-alternatives><bio xml:lang="ru"><p>129090, г. Москва, пр-т Мира, д. 13 стр. 1</p></bio><bio xml:lang="en"><p>13/1, Prospekt Mira, Moscow, 129090</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5998-4874</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белый</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Bely</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>129090, г. Москва, пр-т Мира, д. 13 стр. 1</p></bio><bio xml:lang="en"><p>13/1, Prospekt Mira, Moscow, 129090</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ООО «Центр Фармацевтической Аналитики» (ООО «ЦФА»)</institution></aff><aff xml:lang="en"><institution>LLC "CPHA"</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ООО «ПРОМОМЕД РУС»</institution></aff><aff xml:lang="en"><institution>LLC "PROMOMED RUS"</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>01</day><month>09</month><year>2022</year></pub-date><volume>11</volume><issue>3</issue><fpage>220</fpage><lpage>229</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Комаров Т.Н., Карнакова П.К., Арчакова О.А., Щелгачева Д.С., Багаева Н.С., Шохин И.Е., Заславская К.Я., Белый П.А., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Комаров Т.Н., Карнакова П.К., Арчакова О.А., Щелгачева Д.С., Багаева Н.С., Шохин И.Е., Заславская К.Я., Белый П.А.</copyright-holder><copyright-holder xml:lang="en">Komarov T.N., Karnakova P.K., Archakova O.A., Shchelgacheva D.S., Bagaeva N.S., Shohin I.E., Zaslavskaya K.Y., Bely P.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.pharmjournal.ru/jour/article/view/1304">https://www.pharmjournal.ru/jour/article/view/1304</self-uri><abstract><sec><title>Введение</title><p>Введение. Новая коронавирусная инфекция COVID-19 (Coronavirus Disease 2019) – это острое инфекционное заболевание, вызываемое вирусом SARS-CoV-2 (severe acute respiratory syndrome-related coronavirus 2). Фавипиравир – синтетический противовирусный препарат, применяемый для этиотропной терапии COVID-19. Выпускается в лекарственных формах для перорального и парентерального введения, при этом парентеральный путь введения фавипиравира имеет ряд преимуществ перед пероральным. Разработка и валидация методики количественного определения фавипиравира в плазме крови человека является необходимой процедурой для проведения аналитической части клинического исследования препарата фавипиравира для парентерального введения в виде инфузий, изучения его фармакокинетических параметров и выбора оптимальных доз препарата.</p></sec><sec><title>Цель</title><p>Цель. Целью исследования является разработка и валидация методики определения фавипиравира в плазме крови человека методом высокоэффективной жидкостной хроматографии с использованием с использованием ультрафиолетового детектора (ВЭЖХ-УФ) для дальнейшего изучения фармакокинетики.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Определение фавипиравира в плазме крови человека проводили методом ВЭЖХ-УФ при длине волны 323 ± 2 нм. В качестве пробоподготовки был использован способ осаждения метанолом. Внутренний стандарт: ралтегравир. Подвижная фаза: 0,1%-й раствор муравьиной кислоты в воде с прибавлением 0,08%-го аммиака (элюент А); 0,1%-й раствор муравьиной кислоты, 10%-й раствор воды в ацетонитриле с прибавлением 0,08%-го аммиака (элюент В). Колонка: Phenomenex Kinetex®, C18, 150 × 4,6 мм, 5 мкм. Аналитический диапазон методики: 0,25–200,00 мкг/мл.</p></sec><sec><title>Результаты и обсуждение</title><p>Результаты и обсуждение. Разработанная методика была валидирована по следующим валидационным параметрам: селективность, калибровочная кривая, точность, прецизионность, степень извлечения, нижний предел количественного определения, перенос пробы, стабильность (стабильность исходных и рабочих стандартных растворов аналита и внутреннего стандарта; краткосрочная стабильность; стабильность при трехкратной заморозке-разморозке аналита; долгосрочная стабильность аналита в матрице).</p></sec><sec><title>Заключение</title><p>Заключение. Разработана и валидирована методика определения фавипиравира в плазме крови человека методом ВЭЖХ-УФ. Подтвержденный аналитический диапазон методики составил 0,25–200,00 мкг/мл в плазме крови. Полученный аналитический диапазон позволяет применять разработанную методику для проведения фармакокинетических исследований препаратов фавипиравира.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. Coronavirus disease (COVID-19) is an acute infectious disease caused by SARS-CoV-2 (severe acute respiratory syndrome-related coronavirus 2). Favipiravir is a synthetic prodrug with antiviral activity used for the treatment of COVID-19. There are oral and parenteral dosage forms of favipiravir. Compared with oral administration, parenteral administration has some advantages. Developing a method for the determination of favipiravir in human blood plasma is necessary for performing the analytical part of clinical studies of favipiravir for parenteral administration as an infusion, studying pharmacokinetics, and choosing the optimal dosage of the drug.</p></sec><sec><title>Aim</title><p>Aim. The aim of this study is to develop and validate a method for quantitative determination of favipiravir in human plasma by high-performance liquid chromatography with ultraviolet detection (HPLC-UV) for pharmacokinetic studies.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. Determination of favipiravir in human plasma by HPLC-UV. The UV detection was set at 323 ± 2 nm. The samples were processed by methanol protein precipitation. Internal standard: raltegravir. Mobile phase: 0.1 % formic acid in water with 0.08 % aqueous ammonia (eluent A), 0.1 % formic acid in acetonitrile with 0.08 % aqueous ammonia (eluent B). Column: Phenomenex Kinetex®, C18, 150 × 4.6 mm, 5 μm. Analytical range: 0.25–200.00 μg/mL.</p></sec><sec><title>Results and discussion</title><p>Results and discussion. This method was validated by selectivity, calibration curve, accuracy, precision, spike recovery, the lower limit of quantification, carry-over effect and stability.</p></sec><sec><title>Conclusion</title><p>Conclusion. We developed and validated the method of quantitative determination of favipiravir in human plasma by HPLC-UV. The analytical range was 0.25–200.00 μg/mL in human plasma. The method could be applied in pharmacokinetics studies of favipiravir.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>фавипиравир</kwd><kwd>COVID-19</kwd><kwd>плазма</kwd><kwd>ВЭЖХ-УФ</kwd><kwd>валидация</kwd><kwd>фармакокинетика</kwd></kwd-group><kwd-group xml:lang="en"><kwd>favipiravir</kwd><kwd>COVID-19</kwd><kwd>plasma</kwd><kwd>HPLC-UV</kwd><kwd>validation</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">Yu Y., Lau M. M., Lau J. T. Application of the protection motivation theory to understand determinants of compliance with the measure of banning gathering size &gt;4 in all public areas for controlling COVID-19 in a Hong Kong Chinese adult general population. Plos one. 2022;17(5):e0268336. DOI: 10.1371/journal.pone.0268336.</mixed-citation><mixed-citation xml:lang="en">Yu Y., Lau M. M., Lau J. T. Application of the protection motivation theory to understand determinants of compliance with the measure of banning gathering size &gt;4 in all public areas for controlling COVID-19 in a Hong Kong Chinese adult general population. Plos one. 2022;17(5):e0268336. DOI: 10.1371/journal.pone.0268336.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Заплатников А. Л., Бурцева Е. И., Гирина А. А., Свинцицкая В. И., Леписева И. В. Активная специфическая иммунопрофилактика гриппа в условиях пандемии COVID-19 и начало вакцинации против коронавирусной инфекции, вызванной вирусом SARS-CoV-2. Педиатрия. Consilium Medicum. 2020;4:12–16. DOI: 10.26442/26586630.2020.4.200580.</mixed-citation><mixed-citation xml:lang="en">Zaplatnikov A. L., Burceva E. I., Girina A. A., Svincickaja V. I., Lepiseva I. V. active specific immunoprophylaxis of influenza in the context of the covid-19 pandemic and the beginning of vaccination against coronavirus infection caused by the SARS-COV-2 virus. Pediatrija. Consilium Medicum. 2020;4:12–16. (In Russ.) DOI: 10.26442/26586630.2020.4.200580.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Chenchula S., Karunakaran P., Sharma S., Chavan M. Current evidence on efficacy of COVID‐19 booster dose vaccination against the Omicron variant: A systematic review. Journal of Medical Virology. 2022;94(7):2969–2976. DOI: 10.1002/jmv.27697.</mixed-citation><mixed-citation xml:lang="en">Chenchula S., Karunakaran P., Sharma S., Chavan M. Current evidence on efficacy of COVID-19 booster dose vaccination against the Omicron variant: A systematic review. Journal of Medical Virology. 2022;94(7):2969–2976. DOI: 10.1002/jmv.27697.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Tseng H. F., Ackerson B. K., Luo Y., Sy L. S., Talarico C. A., Tian Y., Bruxvoort K. J., Tubert J. E., Florea A., Ku J. H., Lee G. S. Effectiveness of mRNA-1273 against SARS-CoV-2 Omicron and Delta variants. Nature Medicine. 2022;28(5):1063–1071. DOI: 10.1038/s41591-022-01818-y.</mixed-citation><mixed-citation xml:lang="en">Tseng H. F., Ackerson B. K., Luo Y., Sy L. S., Talarico C. A., Tian Y., Bruxvoort K. J., Tubert J. E., Florea A., Ku J. H., Lee G. S. Effectiveness of mRNA-1273 against SARS-CoV-2 Omicron and Delta variants. Nature Medicine. 2022;28(5):1063–1071. DOI: 10.1038/s41591-022-01818-y.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Zhao L., Zhong W. Mechanism of action of favipiravir against SARS-CoV-2: Mutagenesis or chain termination? The Innovation. 2021;2(4):100165. DOI: 10.1016/j.xinn.2021.100165.</mixed-citation><mixed-citation xml:lang="en">Zhao L., Zhong W. Mechanism of action of favipiravir against SARS-CoV-2: Mutagenesis or chain termination? The Innovation. 2021;2(4):100165. DOI: 10.1016/j.xinn.2021.100165.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Pavlova V., Hristova S., Uzunova K., Vekov T. A review on the mechanism of action of favipiravir and hydroxychloroquine in COVID-19. Res. Rev. Insights. 2021;5:1–7. DOI: 10.15761/RRI.1000167.</mixed-citation><mixed-citation xml:lang="en">Pavlova V., Hristova S., Uzunova K., Vekov T. A review on the mechanism of action of favipiravir and hydroxychloroquine in COVID-19. Res. Rev. Insights. 2021;5:1–7. DOI: 10.15761/RRI.1000167.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Cakir B. K., Firat O., Demirkan K. Administration of Potential Medications for COVID-19 Treatment Through Feeding Tube. Turkish Journal of Pharmaceutical Sciences. 2021;18(3):250. DOI: 10.4274/tjps.galenos.2021.52223.</mixed-citation><mixed-citation xml:lang="en">Cakir B. K., Firat O., Demirkan K. Administration of Potential Medications for COVID-19 Treatment Through Feeding Tube. Turkish Journal of Pharmaceutical Sciences. 2021;18(3):250. DOI: 10.4274/tjps.galenos.2021.52223.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Балыкова Л. А., Заславская К. Я., Павелкина В. Ф., Пятаев Н. А., Селезнева Н. М., Кириченко Н. В., Иванова А. Ю., Родоман Г. В., Колонтарев К. Б., Скрупский К. С., Симакина Е. Н. Эффективность и безопасность инфузионного введения фавипиравира у пациентов, госпитализированных с COVID-19. Фармация и фармакология. 2022;10(1):113–126. DOI: 10.19163/2307-9266-2022-10-1-113-126.</mixed-citation><mixed-citation xml:lang="en">Balykova L. A., Zaslavskaja K. Ja., Pavelkina V. F., Pjataev N. A., Selezneva N. M., Kirichenko N. V., Ivanova A. Ju., Rodoman G. V., Kolontarev K. B., Skrupskij K. S., Simakina E. N. effectiveness and safety of favipiravir infusion in patients hospitalized with COVID-19. Pharmacy &amp; Pharmacology. 2022;10(1):113–126. (In Russ.) DOI: 10.19163/2307-9266-2022-10-1-113-126.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Hailat M., Al-Ani I., Hamad M., Zakareia Z., Abu Dayyih W. Development and Validation of a Method for Quantification of Favipiravir as COVID-19 Management in Spiked Human Plasma. Molecules. 2021;26(13):3789. DOI: 10.3390/molecules26133789.</mixed-citation><mixed-citation xml:lang="en">Hailat M., Al-Ani I., Hamad M., Zakareia Z., Abu Dayyih W. Development and Validation of a Method for Quantification of Favipiravir as COVID-19 Management in Spiked Human Plasma. Molecules. 2021;26(13):3789. DOI: 10.3390/molecules26133789.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Abdallah I. A., Hammad S. F., Bedair A., Elshafeey A. H., Mansour F. R. Determination of favipiravir in human plasma using homogeneous liquid–liquid microextraction followed by HPLC/UV. Bioanalysis. 2021;14(4):205–216. DOI: 10.4155/bio-2021-0219.</mixed-citation><mixed-citation xml:lang="en">Abdallah I. A., Hammad S. F., Bedair A., Elshafeey A. H., Mansour F. R. Determination of favipiravir in human plasma using homogeneous liquid–liquid microextraction followed by HPLC/UV. Bioanalysis. 2021;14(4):205–216. DOI: 10.4155/bio-2021-0219.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Duse P. V., G Baheti K. G. Bioanalytical Method Development and Validation for the Determination of Favipiravir in Spiked Human Plasma by using RP-HPLC. Journal of Pharmaceutical Research International. 2021;33(47A):275–281. DOI: 10.9734/JPRI/2021/v33i47A33014.</mixed-citation><mixed-citation xml:lang="en">Duse P. V., G Baheti K. G. Bioanalytical Method Development and Validation for the Determination of Favipiravir in Spiked Human Plasma by using RP-HPLC. Journal of Pharmaceutical Research International. 2021;33(47A):275–281. DOI: 10.9734/JPRI/2021/v33i47A33014.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Abdallah I. A., Hammad S. F., Bedair A., Mansour F. R. Menthol-assisted homogenous liquid-liquid microextraction for HPLC/UV determination of favipiravir as an antiviral for COVID-19 in human plasma. Journal of Chromatography B. 2022;1189:123087. DOI: 10.1016/j.jchromb.2021.123087.</mixed-citation><mixed-citation xml:lang="en">Abdallah I. A., Hammad S. F., Bedair A., Mansour F. R. Menthol-assisted homogenous liquid-liquid microextraction for HPLC/UV determination of favipiravir as an antiviral for COVID-19 in human plasma. Journal of Chromatography B. 2022;1189:123087. DOI: 10.1016/j.jchromb.2021.123087.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Megahed S., Habib A., Hammad S., Kamal A. Chemometric Approach Based on Factorial and Box-Behnken Designs for Determination of Anti Coronavirus Drug; Favipiravir in Bulk and Spiked Human Plasma by Green HPLC Method. Turkish Journal of Analytical Chemistry. 2021;3(2):70–78. DOI: 10.51435/turkjac.963652.</mixed-citation><mixed-citation xml:lang="en">Megahed S., Habib A., Hammad S., Kamal A. Chemometric Approach Based on Factorial and Box-Behnken Designs for Determination of Anti Coronavirus Drug; Favipiravir in Bulk and Spiked Human Plasma by Green HPLC Method. Turkish Journal of Analytical Chemistry. 2021;3(2):70–78. DOI: 10.51435/turkjac.963652.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Morsy M. I., Nouman E. G., Abdallah Y. M., Zainelabdeen M. A., Darwish M. M., Hassan A. Y., Gouda A. S., Rezk M. R., Abdel-Megied A. M., Marzouk H. M. A Novel LC-MS/MS Method for Determination of the Potential Antiviral Candidate Favipiravir for the Emergency Treatment of SARS-CoV-2 Virus in Human Plasma: Application to a Bioequivalence Study in Egyptian Human Volunteers. Journal of Pharmaceutical and Biomedical Analysis. 2021;199:114057. DOI: 10.1016/j.jpba.2021.114057.</mixed-citation><mixed-citation xml:lang="en">Morsy M. I., Nouman E. G., Abdallah Y. M., Zainelabdeen M. A., Darwish M. M., Hassan A. Y., Gouda A. S., Rezk M. R., Abdel-Megied A. M., Marzouk H. M. A Novel LC-MS/MS Method for Determination of the Potential Antiviral Candidate Favipiravir for the Emergency Treatment of SARS-CoV-2 Virus in Human Plasma: Application to a Bioequivalence Study in Egyptian Human Volunteers. Journal of Pharmaceutical and Biomedical Analysis. 2021;199:114057. DOI: 10.1016/j.jpba.2021.114057.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Rezk M. R., Badr K. A., Abdel-Naby N. S., Ayyad M. M. A Novel, Rapid and Simple UPLC–MS/MS Method for Quantification of Favipiravir in Human Plasma: Application to a Bioequivalence Study. Biomedical Chromatography. 2021;35(7):e5098. DOI: 10.1002/bmc.5098.</mixed-citation><mixed-citation xml:lang="en">Rezk M. R., Badr K. A., Abdel-Naby N. S., Ayyad M. M. A Novel, Rapid and Simple UPLC–MS/MS Method for Quantification of Favipiravir in Human Plasma: Application to a Bioequivalence Study. Biomedical Chromatography. 2021;35(7):e5098. DOI: 10.1002/bmc.5098.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Onmaz D. E., Abusoglu S., Onmaz M., Yerlikaya F. H., Unlu A. Development and validation of a sensitive, fast and simple LC-MS/MS method for the quantitation of favipiravir in human serum. Journal of Chromatography B. 2021;1176:122768. DOI: 10.1016/j.jchromb.2021.122768.</mixed-citation><mixed-citation xml:lang="en">Onmaz D. E., Abusoglu S., Onmaz M., Yerlikaya F. H., Unlu A. Development and validation of a sensitive, fast and simple LC-MS/MS method for the quantitation of favipiravir in human serum. Journal of Chromatography B. 2021;1176:122768. DOI: 10.1016/j.jchromb.2021.122768.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Bulduk İ. HPLC-UV method for quantification of favipiravir in pharmaceutical formulations. Acta Chromatographica. 2021;33(3):209–215. DOI: 10.1556/1326.2020.00828.</mixed-citation><mixed-citation xml:lang="en">Bulduk İ. HPLC-UV method for quantification of favipiravir in pharmaceutical formulations. Acta Chromatographica. 2021;33(3):209–215. DOI: 10.1556/1326.2020.00828.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
