Preformulation studies on suppositories by thermal methods
Giordano, F.; La Manna, A.; Bettinetti, G.P.; Zamparutti, M.
Bollettino Chimico Farmaceutico 129(4): 160-165
1990
ISSN/ISBN: 0006-6648 PMID: 2245004 Document Number: 367474
The application of differential scanning calorimetry (DSC) is described for investigating the interaction between trimethoprim and sulfamethoxypyridazine in suppository formulations containing fat bases (Suppocire, Novata, Witepsol). The thermal behavior of suppositories at various storage times is deeply influenced by the fat base and by interaction between active ingredients. Liquefaction time and dropping temperature were also evaluated for comparison and control purposes.