Comparison of various pharmaceutical properties of clobetasol propionate cream formulations - considering stability of mixture with moisturizer.

Published on Jan 30, 2020in Journal of Pharmaceutical Health Care and Sciences
· DOI :10.1186/S40780-020-0158-Y
Yoshihisa Yamamoto5
Estimated H-index: 5
Yoshinori Onuki15
Estimated H-index: 15
+ 1 AuthorsTatsuo Koide11
Estimated H-index: 11
Background: The clobetasol propionate cream formulations (CLB Cr ) belong to the "strongest" group, and are used widely. In addition, those formulations are often used as a mixture with moisturizer. Recently, we evaluated pharmaceutical properties of the CLB Cr using near infrared (NIR) spectroscopy, and characteristic NIR spectra depending on the formulation were observed. In the present study, we attempted to evaluate the more diverse pharmaceutical properties of CLB Cr , including the stability of mixture of CLB Cr and moisturizer. Method: Pharmaceutical properties of CLB Cr were evaluated using from rheological characteristics, microscopic observation, dye permeability observations, electrical conductivity method, thermogravimetry-differential thermal analysis (TG-DTA) and near infrared (NIR) spectroscopy. Stability of mixtures of CLB Cr and moisturizer were evaluated using from dye method and NIR spectroscopy. Results: The hardness of Dermovate(R) (DRM), Glydil(R) (GDL), and Myalone(R) (MYA) was greater than that of CLB Cr . High concentrations of white beeswax were considered the reason for the hardness of DRM and GDL. On the other hand, the hardness of MYA may be due to the presence of macrogol 6000. After storage of the cream formulations discharged from the tube at room temperature, mass reduction and attenuation of the peak reflecting water of NIR spectroscopy occurred in a time-dependent manner, except for GDL and MYA. Only GDL was shown to be a w/o-type formulation by dye and electric conductivity measurements, which suggested that this was the reason for the lack of changes in the mass or NIR spectrum of samples after storage. In the NIR spectrum of MYA, the peak reflecting water slightly increased in a time-dependent manner, suggesting the water absorption of macrogol 6000. TG-DTA provided curves indicating the presence of water in each formulation, except for MYA, which was consistent with water quantification previously reported. Finally, when mixing the CLB Cr with a moisturizer, in any CLB Cr , the stability of the mixture with w/o-type moisturizer varies greatly depending on the each CLB Cr . Conclusion: Thus, even for cream formulations with the same active pharmaceutical ingredient, pharmaceutical properties and stability of mixture with moisturizer may different significantly.
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