Understanding Compression-Induced Amorphization of Crystalline Posaconazole

Understanding how mechanical forces alter drug substance properties is a growing challenge in pharmaceutical development. While prior research has shown that physical stress can induce phase changes in crystalline compounds, the specific mechanisms remain unclear. This gap motivated a closer look at how compression affects amorphous formation in APIs. No prior work had resolved how excipients might influence this process. The study of drug amorphization under mechanical stress is still in early stages. Existing knowledge lacks detailed insights into stress distribution during compression. The role of excipients in this transformation has not been fully explored. This paper contributes by examining the effects of stress and excipients on posaconazole during compression.

The aim of this work was to investigate how mechanical compression leads to amorphization of crystalline posaconazole. The specific problem addressed is the lack of understanding about how stress and excipients influence this transformation. Compression-induced amorphization can impact drug performance, so this study sought to clarify the process. The motivation came from the need to better control drug form during manufacturing. By varying compression parameters and excipient types, the researchers aimed to isolate key factors. The study also aimed to quantify the extent of amorphization using advanced analytical tools. Understanding these effects could improve formulation design. The findings may help optimize drug processing to avoid unintended phase changes.

The study used solid-state NMR to detect and measure amorphous content in compressed tablets. Finite element analysis was applied to model stress distribution during compression. The researchers examined the effects of axial and shear stresses on amorphization. They tested different excipients, including microcrystalline cellulose and calcium phosphate. The impact of drug loading on amorphization was also evaluated. A lubricant was included to assess its effect on the process. The study compared amorphization levels across various formulations. The results were analyzed to determine the role of mechanical and excipient factors.

Compression-induced amorphization of posaconazole was found to depend on both axial and shear stresses. Punch velocity up to 100 mm/s had little effect on the amorphous content. Microcrystalline cellulose and calcium phosphate both increased amorphization at low drug loading. The addition of a lubricant reduced amorphous content in MCC-POSA tablets. However, the lubricant had minimal effect on neat POSA or DCPA-POSA tablets. Higher drug loading was associated with lower amorphization levels. These results suggest interparticulate stresses play a key role in the process. The findings highlight the importance of excipient choice in controlling amorphization.

The authors concluded that both axial and shear stresses are important in the amorphization of crystalline posaconazole. The study showed that excipient type significantly influences the extent of amorphization. At low drug loading, microcrystalline cellulose and calcium phosphate enhanced amorphization. The lubricant reduced amorphous content in MCC-POSA tablets but not in others. Drug loading was found to have a direct impact on amorphization levels. These findings support the role of interparticulate stresses in the process. The results suggest that excipient selection can be used to control amorphization. The study provides insights into the mechanical and formulation factors affecting drug form.