In recent years, CM has become increasingly popular in the pharmaceutical industry for the production of OSD forms. Most of the newly developed APIs nowadays are extremely cohesive and sticky with a mean particle size particle of <
100 μm, a wide PSD and a high tendency to agglomerate, making them difficult to accurately dose using loss-in-weight equipment during CM. In this research paper, the effect of various glidants on the volumetric and gravimetric feeding of several APIs was assessed. Three challenging API (APAPμ, MPT and SD) and four different glidants (Aerosil® 200, Aerosil® R972, Syloid® 244FP and TRI-CAFOS® 200-7) were selected. For all feeding trials, a GEA CF equipped with 20 mm concave screws was used, in combination with an external catch scale. The volumetric feeding trials showed the ability of each glidant to increase the FF