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In vitro study on the interaction of ketotifen fumarate with anhydrous theophylline BJPS
Sayeed,Mohammed Aktar; Habib,Razibul; Rahman,Mominur; Banna,Hasan Al; Rana,Sohel.
The purpose of the present study was to investigate the interaction between ketotifen fumarate and anhydrous theophylline in aqueous media of various pH (1.2 and 6.8). Using Job's continuous-variation analysis and Ardon's spectrophotomeric measurement methods, the values of the stability constants of theophylline with ketotifen were determined at a fixed temperature (37 ºC) at various pH. The stability constants, ranging between 5.66 and 9.92, were derived from Ardon's plot, indicating that comparatively stable complexes had formed as a result of an interaction between the drugs. However, following the interaction of theophylline with ketotifen, stability constants were <1 at gastric pH (1.2) and intestinal pH (6.8). Concurrent administration of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Stability constant; Job's method; Ardon's method; Ketotifen; Theophylline.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502012000200004
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