摘要:
A device and method are provided for percutaneous transdermal delivery of a biologically active agent. The coating formulation containing the biologically active agent and a vasoconstrictor is applied to the skin piercing elements using known coating techniques and then dried. The device is applied to the skin of a living animal, causing the microprojections to pierce the stratum corneum and to deliver an effective dose of the biologically active agent and vasoconstrictor to the animal.
摘要:
A method and device are described for applying a microprotrusion member (44) including a plurality of microprotrusions (90) to the stratum corneum with impact. The method and device are used to improve transport of an agent across the skin for agent delivery or sampling. The applicator (10, 60, 80) causes the microprotrusion member (44) to impact the stratum corneum with a certain amount of impact determined to effectively pierce the skin with the microprotrusions (90). The preferred applicator (10, 60, 80) impacts the stratum corneum with the microprotrusion member (44) with an impact of at least 0.05 joules per cm2 of the microprotrusion member (44) in 10 msec or less.
摘要:
Skin patches (20) having a microprojection array (10), a reservoir (18) containing an antigenic agent and an immune response augmenting adjuvant, and methods of using same to vaccinate animals (e.g., humans) is disclosed. In a preferred embodiment, the microprojection arrays (10) are composed of a photoetched and micro-punched titanium foil (14). The microprojections (12) are coated with a liquid formulation containing a vaccine antigen and an adjuvant such as glucosaminyl muramyl dipeptide, dried, and applied to skin of the animal to be vaccinated using an impact applicator. The microprojections (12) create superficial pathways through the stratum corneum to facilitate permeation of antigenic agent and adjuvant. Antigen dose and depth of penetration can be controlled. This technology has broad applicability for a wide variety of therapeutic vaccines to improve efficacy, and convenience of use.
摘要:
Microprojection members (10) having a reservoir containing an antigenic agent and methods of using such members to vaccinate mammals (e.g., humans) are disclosed. The microprojection members are used to transdermally deliver an antigenic agent (e.g., a vaccine antigen) with substantially reduced skin reactions. This is achieved by delivering an induction amount and thereafter delivering one or more subsequent booster amounts. The induction amount is relatively larger than the booster amount. This technology has broad applicability for a wide variety of therapeutic vaccines to improve efficacy and convenience of use.
摘要:
A transdermal delivery member having a plurality of microprojections adapted to pierce the stratum corneum of a subject, each of the microprojection having a length less than 145 microns. In a preferred embodiment, each microprojection has a length in the range of approximately 50-145 microns.
摘要:
An apparatus for transdermally delivering a biologically active agent comprising (i) a gel pack containing a hydrogel formulation and (ii) a microprojection member having top and bottom surfaces, a plurality of openings that extend through the microprojection member and a plurality of stratum corneum-piercing microprotrusions that project from said bottom surface of the microprojection member, the microprojection member being adapted to receive the gel pack whereby the hydrogel formulation flows through the microprojection member openings. Preferably, the hydrogel formulation comprises a water-based hydrogel.
摘要:
A drug delivery system for delivering a biologically active agent through the skin of a patient comprises (i) a pretreatment patch adapted to be placed on the patient's skin, the pretreatment patch having a backing membrane and a microprojection array, the microprojection array being adhered to the backing membrane, the microprojection array including a plurality of microprojections adapted to pierce the stratum corneum of the patient, the pretreatment patch including a skin template that remains on the patient's skin after the pretreatment patch is applied to and removed from the patient's skin, and (ii) a gel patch having a top and bottom surface, the gel patch including a reservoir containing a hydrogel formulation, the gel patch having a skin contact area in the range of approximately 0.5-30 cm2.
摘要:
This invention relates to a method for inhibiting a decrease in the transdermal flux of an agent that is being transdermally delivered or sampled over a prolonged period of time wherein the delivery or sampling involves disrupting at least the stratum corneum layer of the skin to form pathways through which the agent passes. The desired result is achieved by co-delivering or co-sampling the agent with an amount of at least one anti-healing agent wherein the amount of the anti-healing agent is effective in inhibiting a decrease in the agent transdermal flux compared to when the delivery or sampling of the agent is done under substantially identical conditions except in the absence of the anti-healing agent(s).
摘要:
A transdermal delivery system having a microprojection array with one or more voids configured to allow an adhesive backing to attach to a user's skin and, hence, improve retention of the system thereto. Radial voids can be configured to enhance compliance of the array to conform more readily to non-flat areas of the skin.
摘要:
An apparatus and method for transdermally delivering a biologically active agent comprising a delivery system having a microprojection member (or system) that includes a plurality of microprojections (or array thereof) that are adapted to pierce through the stratum corneum into the underlying epidermis layer, or epidermis and dermis layers, a formulation containing the biologically active agent and an oscillation inducing device. In one embodiment, the biologically active agent is contained in a biocompatible coating that is applied to the microprojection member. In a further embodiment, the delivery system includes a gel pack having an agent-containing hydrogel formulation that is disposed on the microprojection member after application to the skin of a patient. In an alternative embodiment, the biologically active agent is contained in both the coating and the hydrogel formulation.