27. April 2018
There is a growing body of evidence which suggests that formerly regarded “inert” pharmaceutical excipients have the potential to influence oral drug bioavailability. The solubilizing agent polyethylene glycol 400 (PEG 400), for instance, has a sex-specific effect on P-glycoprotein (P-gp)-mediated drug bioavailability. We hypothesized that such an effect could be via PEG-induced alteration of P-gp activity and/or expression to different extents in males and females. To test this hypothesis...
06. November 2017
Many efforts have been made in the past to understand the function of lactose fines which are given as a ternary component to carrier-based dry powder inhaler formulations. It is undisputed that fines can significantly improve the performance of such formulations, but choosing the right amount of fines is a crucial point, because too high concentrations can have negative effects on the dispersion performance
17. April 2016
Males and females respond differently to drugs: indeed, sex plays a crucial role in determining drug pharmacokinetics and pharmacodynamics. Excipients have also been shown to enhance the biovailability of drugs differently in men and women. The aim of this work was to investigate whether rodents are a good model in which to study sex-specific effects of polyethylene glycol 400 (PEG 400) on the bioavailability of ranitidine. Ranitidine (50 mg/Kg) was dissolved in water with different amounts of...
16. February 2016
This study evaluated the feasibility of liquisolid pellets as an innovative drug delivery system to improve the dissolution rate of low solubility drugs, combining the advantageous properties of multiple-unit dosage forms and the liquisolid formulations. The effects of crospovidone (Kollidon® CL-SF) as a coating and disintegrating material (4 or 8%) and the type of non-volatile solvent, PEG 400 or Cremophor® EL, on the felodipine (model drug) dissolution profile were assessed. All liquisolid...