Multi-reservoir device for transdermal drug delivery and sensing

A medical device for transdermal administration of one or more pharmaceutical agents to a patient in need thereof comprising:

• a substrate;
• a plurality of discrete reservoirs in the substrate;
• one or more pharmaceutical agents stored in the reservoirs;
• discrete reservoir caps which prevent the one or more pharmaceutical agents from passing out from the reservoirs;
• control means for actuating release of the one or more pharmaceutical agents from one or more of the reservoirs by disintegrating or permeabilizing the reservoir caps;
• an adhesive or strap material for securing the device to the skin of the patient;
• and
• a body defining a transport medium reservoir disposed between the reservoir caps and the skin of the patient, the body and reservoir facilitating transport of the one or more pharmaceutical agents to the skin following their release from the one or more reservoirs, wherein the transport medium reservoir comprises a single pool of a biocompatible transport fluid into which the one or more pharmaceutical agents are diluted prior to delivery to the skin.