当前位置： SCI文献检索 > PHARMACEUTICAL DEVELOPMENT AND TECHNOLOGY期刊下所有文献 > Effect of processing and formulation variables on the stability of a salt of a weakly basic drug candidate.

Effect of processing and formulation variables on the stability of a salt of a weakly basic drug candidate.

Abstract：

:The effect of some processing and formulation variables on the stability of tablets containing a crystalline salt of a triazine derivative was studied. The salt has a relatively low melting point and a low microenvironmental pH due to the weakly basic nature of the parent compound (pKa = 4.0). This compound decomposes through acid-catalyzed hydrolysis. A full factorial design was used to study the effect of three variables on tablet stability: aqueous wet granulation, ball milling of the salt and filler prior to manufacturing, and the inclusion of sodium carbonate in the formulation as a pH modifier. In addition to the factorial design experiments, a batch of tablets was prepared by wet granulation, using sodium bicarbonate as the pH modifier. Stability of the drug in tablets was evaluated at 40 degrees C/75% relative humidity (RH) and at 40 degrees C/ambient humidity. Stability of tablets was adversely affected by wet granulation. However, stability was greatly improved by wet granulation in the presence of sodium carbonate. While sodium carbonate enhanced drug stability in the tablets, regardless of the manufacturing process, wet granulated tablets were more stable than tablets containing sodium carbonate and prepared without wet granulation. Similarly prepared tablets by using sodium bicarbonate were remarkably less stable compared with those containing sodium carbonate. The use of sodium bicarbonate as a pH modifier resulted in only marginal enhancement of tablet stability, suggesting that a higher microenvironmental pH than that provided by sodium bicarbonate is needed to maximize stability. Despite the low lattice energy of the salt and the potential for disruption of salt crystallinity by mechanical stress, milling did not appear to have an adverse effect on tablet stability under the current experimental conditions. This study shows that selection of the proper manufacturing process, in conjunction with the appropriate pH modifier, could be critical to dosage form stability.

journal_name

Pharm Dev Technol

journal_title

Pharmaceutical development and technology

authors

Badawy S,Vickery R,Shah K,Hussain M

doi

10.1081/pdt-200031417

subject

Has Abstract

pub_date

2004-08-01 00:00:00

pages

239-45

issue

eissn

1083-7450

issn

1097-9867

journal_volume

pub_type

杂志文章

在线工具

Effect of processing and formulation variables on the stability of a salt of a weakly basic drug candidate.