Peer-Reviewed Journal Details
Mandatory Fields
Tierney, TB,Guo, YN,Beloshapkin, S,Rasmuson, AC,Hudson, SP
2015
November
Crystal Growth & Design
Investigation of the Particle Growth of Fenofibrate following Antisolvent Precipitation and Freeze-Drying
Published
()
Optional Fields
FORMULATION CRYSTALLIZATION
15
5213
5222
Submicron to small-micron-sized particles of the hydrophobic drug, fenofibrate, were prepared by controlled crystallization in order to influence its dissolution behavior. An antisolvent precipitation process successfully generated particles (200-300 nm) which matched the size and dissolution behavior of a commercial wet-milled formulation of the drug. Although the preparation of submicron-sized particles was straightforward, retaining their size in suspension and during isolation was a challenge. Additives were employed to temporarily stabilize the suspension, and extend the time window for isolation of the submicron particles. Precipitated particles were isolated primarily by immediate freeze-drying, but drying stresses were found to destabilize the fragile submicron system. The growth pathway of particles in suspension and during oven and freeze-drying were compared. Although the growth pathways appeared considerably different from a visual morphological perspective, an investigation of the electron diffraction patterns and the inner-particle surfaces showed that the growth pathways were the same: molecular addition by Ostwald ripening. The observed differences in the time-resolved particle morphologies were found to be a result of the freeze-drying process.
10.1021/acs.cgd.5b00662
Grant Details