Microspheres made from lipids and polymers provide an interesting opportunity for use as drug delivery vehicles for numerous therapeutics that can range in size from small molecules to macromolecules like peptide/protein. In addition, cationization on the lipid-based microsphere systems has tremendous application for drug absorption enhancement and for ferrying compounds across cell membranes. Surely excipients play an important role not only to make an acceptable microsphere product but also to minimize/prevent the degradation of the incorporated drug molecules. Special emphasis is being...