Estudo do impacto do descarte dos comprimidos de captopril no meio ambiente

• Autor(a) principal: Coelho, Marcelle Castro
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/15781
• topic: Captopril; captopril disulfide; validation; stability; Captopril; dissulfeto de captopril; validação; estabilidade; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA

Captopril is one of the widely used anti-hypertension remedies used in Brazil. It is a crystalline white or slightly yellow powder, with a typical sulfide odor, easily soluble in water, ethanol, chloroform and methanol. In aqueous solutions, captopril tends to oxidize, producing growing concentrations of its degradation product, the dimmer captopril disulfide. Beyond this, in the period of 24 hours, more than 95% of the absorbed dose is excreted in the urine, 40 to 50% of the component in its original form, and the remaining in the form of captopril disulfide and other metabolites, which are discharged in the domestic waterstreams, reaching other waterbodies. Thus, the present work was planned to study the impact and the behavior of this remedy and its degradation product in environmental waters. To reach this goal, initially the validation of the analytical method selected to quantify its degradation was performed, high efficiency liquid chromatography, a suitable tool to guarantee reliability to analytical data. The stability of the pharmaceutical product, in the form of tablets, as well as in aqueous solutions, during 144 days. The results indicated that captropril tablets when stored in its original package, blister, to a controlled temperature of 40o C and 75% relative humidity, were kept stable. The average captopril concentration was equal to 97.4%. On the other hand, when diluted and stored in the temperature and relative humidity mentioned before, for a 1 mg/mL concentration, the substance captopril ranged from 95.7 to 68.5%. Its degradation product, captopril disulfide, increased from 1.7 to 31.1%, in around 144 days