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1.
Rev. colomb. ciencias quim. farm ; 51(2)mayo-ago. 2022.
Article in Portuguese | LILACS-Express | LILACS | ID: biblio-1535845

ABSTRACT

Objetivos: Desenvolver e validar um método analítico para a análise simultânea de atorvastatina (ATO), losartana (LOS) e metformina (MTF) em formulações farmacêuticas magistrais por CLAE. Método: O método foi desenvolvido empregando o cromatógrafo a líquido modelo Dionex® Ultimate 3000, acoplado ao detector de arranjo de diodos (DAD) e a validação se deu conforme compêndios de validação internacional e nacional. Os seguintes parâmetros foram analisados: linearidade, precisão, exatidão, robustez, seletividade, LD e LQ. A separação cromatográfica foi realizada na coluna Sigma-Aldrich® C18, fase móvel MeOH:H2O (78:22 v/v), pH 3,0 e vazão de 0,3 mL-min-1, modo isocrático. As detecções foram realizadas nos comprimentos de onda de 225 nm (LOS), 236 nm (MTF) e 246 nm (ATO). Resultados: O método foi linear, com coeficientes de correlação linear (r)> 0,99 para todos os fármacos, preciso (DPR entre medidas < 2 %), exato (recuperação entre 98-102 %). As variações propostas no estudo de robustez não tiveram influência significativa nos resultados, exceto a coluna cromatográfica. O método foi seletivo, pois os excipientes não interferiram nas análises. A sensibilidade do método foi demonstrada através da determinação teórica dos LD e LQ. Conclusão: Os resultados obtidos sugerem que o método cromatográfico desenvolvido e validado nessa pesquisa poderá ser empregado nas análises de rotina dos laboratórios de controle de qualidade de medicamentos contendo esses fármacos de forma isolada ou combinados em formulações farmacêuticas de uso oral.


SUMMARY Aims: To develop and validate an analytical method for the simultaneous analysis of atorvastatin (ATO), losartan (LOS), and metformin (MTF) in pharmaceutical compounding by HPLC. Method: The method was developed using a liquid chromatograph model Dionex® Ultimate 3000, coupled to a diode array detector (DAD), and validation was carried out according to international and national validation compendiums. The following parameters were analyzed: linearity, precision, accuracy, robustness, selectivity, LD, and LQ. Chromatographic separation was performed on a Sigma-Aldrich® C18 column, mobile phase MeOH:H2O (78:22 v/v), pH 3.0, and flow rate of 0.3 mL-min-1, isocratic mode. Detections were performed at 225 nm (LOS), 236 nm (MTF), and 246 nm (ATO) wavelengths. Results: The method was linear, with linear correlation coefficients (r)> 0.99 for all drugs, precise (DPR between measurements < 2 %), accurate recovery (between 98-102 %). The variations proposed in the robustness study had no significant influence on the results, except for the chromatographic column. The method was selective, as the excipients did not interfere in the analyses. The sensitivity of the method was demonstrated through the theoretical determination of LD and LQ. Conclusion: The results obtained suggest that the chromatographic method developed and validated in this research can be used in the routine analyzes of quality control laboratories of drugs containing these drugs alone or combined in pharmaceutical formulations for oral use.

2.
Braz. J. Pharm. Sci. (Online) ; 56: e17758, 2020. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1089171

ABSTRACT

We developed and validated a stability-indicating assay method for the simultaneous determination of enrofloxacin and piroxicam in combination and in the presence of degradation products. Reverse-phase high-performance liquid chromatography analyses were carried out on a Vertisep C18 column and acetonitrile-water (48:52 v/v, pH 3.0) mobile phase with a 1.00 mL min−1 flow rate. The efficient chromatographic separation of these drugs and their forced degradation products was achieved in less than 5min with a peak purity match factor higher than 950. The method used showed linearity in the concentration ranges of 0.25 to 16.0 µg mL−1 for enrofloxacin (r = 0.9997) and 0.125 to 8.0 µg mL−1 for piroxicam (r = 0.9999) as well as precision (relative standard deviation lower than 2%), accuracy (mean recovery 100 ± 2%), and robustness, according to ICH (International Conference on Harmonization) and AOAC (Association of Official Analytical Chemists) guidelines. This method can simultaneously determine the combination of these drugs in a veterinary formulation and separate the drug peaks from their forced degradation products. Additionally, its optimized chromatographic conditions can contribute to the quality control of this formulation in pharmaceutical manufacturing plants and minimize waste from the organic solvent.

3.
Rev. bras. toxicol ; 21(2): 81-86, 2008. graf, tab
Article in Portuguese | LILACS | ID: lil-524339

ABSTRACT

The easy access of the Brazilian population to medicines is a strong component to the occurrence of poisoning with medication. Due to differences in pharmacokinetic, pharmacodynamic and factors of exposure, children are more susceptible to the occurrence of poisoning with medication than adults. This study aimed to evaluate poisoning with medication in childhood in the state of Mato Grosso do Sul, from January 2005 to December 2006, reported to the Integrated Center of Toxicological Surveillance (CIVITOX). Through the analysis of CIVITOX’s filling cards of attendance and notification, it was found 296 cases of children that poisoned with medication. Psychotropics were the main responsible for poisonings (22.7 percent), followed by antimicrobials and antiparasitic (14.9 percent) and drugs that act on the respiratory system (13.0 percent). Children aged 1 to 4 years old were involved in 79.4 percent of the total poisoning occurred with medication. Thus, it is essential to disclosure risk factors for society than parents will have more knowledge and could change behavior about the subject.


O fácil acesso da população brasileira aos medicamentos constitui um forte componente para a ocorrência de eventos tóxicos. Devido às diferenças na farmacocinética, farmacodinâmica e fatores de exposição, crianças são mais suscetíveis à ocorrência de eventos tóxicos com medicamentos que adultos. O presente estudo teve por objetivo avaliar os eventos tóxicos com medicamentos ocorridos em crianças no estado de Mato Grosso do Sul, no período de janeiro de 2005 a dezembro de 2006, notificados ao Centro Integrado de Vigilância Toxicológica (CIVITOX). Através da análise das Fichas de Atendimento e Notificaçãodo CIVITOX foram encontrados 296 eventos tóxicos com medicamentos em crianças. Os medicamentos que atuam no sistema nervoso central foram os principais responsáveis pelos eventos tóxicos (22,7 por cento), seguidos de antimicrobianos e antiparasitários (14,9 por cento) e medicamentos que atuam no sistema respiratório (13,0 por cento). Do total de eventos tóxicos, 79,4 por cento ocorreram em crianças de 1 a 4 anos. Desta forma, é indispensável a divulgação dos fatores de risco à sociedade para que haja mais conhecimento sobre o assunto e mudança de comportamento, principalmente dos responsáveis pelas crianças de faixa etária de maior risco.


Subject(s)
Humans , Child , Accident Prevention , Poisoning , Toxic Substances , Drug Evaluation/statistics & numerical data , Health Surveillance , Poison Control Centers
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