peptide drugs are too large to be delivered through passive transdermal patches and may be delivered using technology such as electrical assist iontophoresis for large molecule drugs iontophoresis is a technique employed for enhancing the flux of ionized substances through membranes by application of electric current one example of an iontophoretic membrane is given in u s pat no 5 080 646 to theeuwes the principal mechanisms by which iontophoresis enhances molecular transport across the skin are a repelling a charged ion from an electrode of the same charge b electroosmosis the convective movement of solvent that occurs through a charged pore in response the preferential passage of counter ions when an electric field is applied or c increase skin permeability due to application of electrical current in some cases it may be desirable to administer in the form of a kit it may comprise a container for containing the separate compositions such as a divided bottle or a divided foil packet typically the kit comprises directions for the administration of the separate components the kit form is particularly advantageous when the separate components are preferably administered in different dosage forms e g oral and parenteral are administered at different dosage intervals or when titration of the individual components of the combination is desired by the prescribing physician an example of such a kit is a so called blister pack blister packs are well known in the packaging industry and are widely used for the packaging of pharmaceutical unit dosage forms tablets.