Abstract
Objective: The purpose of this work was to develop a controlled release of ziprasidone with no food effect by the osmotic release strategy.
Methods: The solution of ziprasidone and poloxamer188 (P188) with different weight ratios was spray-dried to form solid dispersion of ziprasidone (SD-ZIP). The SD-ZIP was characterized using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), X-ray powder diffraction (X-RD) and solubility testing. The SD-ZIP osmotic pump tablets were prepared by wet granulation method. The effect of formulation variables on the release characteristic was investigated. The SD-ZIP osmotic pump tablets were administered to fasted and fed beagle dogs and their pharmacokinetics were compared to commercial formulation Zeldox® as a control.
Results: The results of DSC and X-RD indicated that ziprasidone resides in P188 with no crystalline changes. Solubility studies demonstrated that the solubility of SD-ZIP was substantially improved compared to ziprasidone and physical mixtures of ziprasidone and P188. The optimized formulation and drug release profiles of SD-ZIP osmotic pump tablets in different medium were obtained which showed typical osmotically controlled release and could fitted to zero-order kinetics with good linear correlation. Pharmacokinetic studies in beagle dogs showed ziprasidone with prolong actions and no food effect was achieved simultaneously in SD-ZIP osmotic pump tablet compared with Zeldox®.
Conclusion: The SD-ZIP osmotic pump tablet could be able to enhance the bioavailability in the fasted state and showed sustained release with prolonged actions.
Declaration of interest
The authors report no conflicts of interest. The authors duly acknowledge the support and scientific inputs provided by Jiangsu Nhwa Pharmaceutical Co., Ltd. (Xuzhou, China).