29. Jan 2016
While it is desirable for processing, handling and packaging purposes, to produce tablets of high mechanical strength, the same tablets are supposed to disintegrate rapidly upon contact with water. Superdisintergrants built into tablet formulations help to bridge these two extremes. The three main mechanisms exhibited by disintegrants are swelling, wicking (i.e.transportation of water into and throughout the tablet matrix), and shape recovery (i.e. a delayed and controlled elastic recovery). Swelling can be attributed to sodium starch glycolate (SSG) as its prevailing behavior. Croscarmellose sodium (CCS) shows predominantly wicking, whereas crospovidone (PVPP) is characterised by strong shape recovery. It is noteworthy, though, that none of the disintegrants falls into one sole category.