Coating process device Transdermal drug delivery having coated microportuberancias.

Process for coating the surface of one or more microprojections of a series of microprojections comprising the following steps: (i) providing a series of microprojections comprised of one or more microprojections; (Ii) treating the surface of one or more of said microprojections of said plurality of microprojections with a method selected from the group consisting of chemical pre-attack, plasma treatment, heat treating, rinsing with an alkaline detergent and rinsing with a wetting agent; (Iii) providing a coating formulation comprising an active agent; (Iv) applying said coating formulation to said treated of said one or more microprojections surfaces; and (v) drying said coating formulation onto said surfaces to form a coating.