𝗜𝗻𝘃𝗲𝘀𝘁𝗶𝗴𝗮𝘁𝗶𝗻𝗴 𝘁𝗵𝗲 𝗘𝗳𝗳𝗲𝗰𝘁𝘀 𝗼𝗳 𝗙𝗼𝗿𝗺𝘂𝗹𝗮𝘁𝗶𝗼𝗻 𝗩𝗮𝗿𝗶𝗮𝗯𝗹𝗲𝘀 𝗼𝗻 𝘁𝗵𝗲 𝗗𝗶𝘀𝗶𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 𝗼𝗳 𝗦𝗽𝗿𝗮𝘆 𝗗𝗿𝗶𝗲𝗱 𝗔𝗺𝗼𝗿𝗽𝗵𝗼𝘂𝘀 𝗦𝗼𝗹𝗶𝗱 𝗗𝗶𝘀𝗽𝗲𝗿𝘀𝗶𝗼𝗻 𝗧𝗮𝗯𝗹𝗲𝘁𝘀
Amorphous solid dispersion (#ASD) tablets based on hydrophilic polymer carriers may encounter disintegration challenges. In this work, the effect of different formulation composition variables on the ASD tablet disintegration performance was systematically studied. GDC-0334: copovidone (#PVPVA) 60: 40 ASD prepared by spray drying was selected as the model ASD system. The effects of ASD loading, filler type and ratio, disintegrant type and level were then investigated using tablets made by direct compression process. Tablet disintegration time increased with the increase of ASD loading, especially when ASD loading exceeded 50%. At the same tablet solid fraction, when lactose was used as the soluble filler, faster tablet disintegration time was observed compared to the tablets with mannitol as the soluble filler.
Among the three tested disintegrants, croscarmellose sodium performed the best in facilitating the ASD tablet disintegration, followed by sodium starch glycolate, and crospovidone was the poorest. When croscarmellose sodium was used as the disintegrant, 5% level was sufficient to enable ASD tablet disintegration at 60% ASD loading and further increase of croscarmellose sodium level to 8% did not provide additional benefit. Water uptake experiments were performed on selected tablets and the results demonstrated a positive correlation with tablet disintegration time, indicating water penetration is a major contributing step for the disintegration of our ASD tablets.
Overall, this work provides a rationale for excipient selection and insights into building a platform formulation approach for developing immediate-release ASD tablets.