Abstract: A low-profile applicator, and a method of manufacturing and use thereof, for impacting microneedles against the stratum corneum of a person having a housing, a diaphragm member having the microneedles, a folding member having interlinking members that hinge-ably rotate with a force member, operatively attached thereto, between a resting position and an extended position. The folding member translates energy stored within the force member when release while retaining the force member in an energized state when in the resting position.

Abstract: A transdermal drug delivery system with microprojections for disrupting a body surface to an individual. At least some of the microprojections arise from a first microprojection layer and at least some of the microprojections arise from a second microprojection layer. The first and second microprojection layers are stacked together.

Abstract: A transdermal drug delivery system with microprojections for disrupting a body surface to an individual. At least some of the microprojections have a depression for increasing drug loading by a drug coating.

Abstract: A transdermal drug delivery system with microprojections for disrupting a body surface to an individual. At least some of the microprojections form groups in a microprojection array. There are repeated units of such groups in the microprojection array.

Abstract: An apparatus and method are provided for selectively applying an agent-containing liquid coating to extremely tiny skin piercing microprojections (10). The coating solution is applied to the skin piercing microprojections (10) using a coating technique which selectively coats only the skin piercing microprojections (10) and not the substrate (12) from which the microprojections (10) extend, and then dried. The coating method includes providing an agent-containing coating liquid and conveying the liquid to a liquid holding surface having a coating transfer region. The depth of the coating liquid at the coating transfer region is precisely controlled. The microprojections are then immersed to a predetermined level in the coating liquid. The liquid that coats the microprojections (10) is then dried to form a solid agent-containing coating on the microprojections (10).