In a recent clinical study with the drug posaconazole, a solid dispersion was formulated using hotmelt extrusion to disperse posaconazole in hydroxypropyl methylcellulose (HPMC) acetate succinate(HPMC-AS) matrix. Hydroxypropyl methylcellulose (HPMC) acetate succinate is a polymer showingpH-sensitive reactions in the human gastro-intestinal tract. Results obtained by Hens et al. [37] showedthat dispersing posaconazole in HPMC-AS caused a supersaturation of the drug throughout thegastro-intestinal tract and an absorption profile less dependent on the gastric pH, fed or fasted statein healthy human test subjects. This study showed that formulating a delayed release formulationprovided more sufficient posaconazole release in comparison to an oral solution of posaconazole.This study showed that fasted state absorption of posaconazole was improved drastically, andfurther absorption along the gastro-intestinal tract was also noted due to the delayed release ofposaconazole [37]