Pharmaceutics is comprised of the science of the design and evaluation of dosing regimens and dosage forms of drugs. Recently, a drug delivery system which optimizes drug effectiveness and minimizes adverse effects, by using some dosage forms, has been applied in the field of pharmaceutics. Our main research interest includes the improvement of intestinal absorption of poorly absorbed drugs such as peptides and protein drugs, transdermal delivery of drugs, regulation of transport of drugs, transnasal drug delivery to the brain, and the development of drug delivery system for the treatment of bone diseases and oxidative stress.