Cartridge portion of transdermal drug delivery apparatus and methods

A cartridge for supplying fluid in a transdermal drug delivery apparatus, the cartridge comprising:

• a body including a substantially concave wall, wherein
• the substantially concave wall at least partially defines an interior of the body for containing the fluid,
• the body at least partially defines a first cavity including a cylindrical section and a frustoconical section, the cylindrical section tapering to the frustoconical section, a second cavity, and a passageway connected between the cylindrical section of the first cavity and the second cavity,
• the body at least partially defines opposite first and second openings to the interior of the body, wherein the first opening is contiguous with the first cavity, and the second opening is contiguous with the second cavity, and
• the second opening is proximate the substantially concave wall.

A cartridge for supplying fluid in a transdermal drug delivery apparatus, the cartridge comprising:

• a body at least partially defining
• an interior for containing the fluid,
• a first cavity including a cylindrical section and a frustoconical section, the cylindrical section tapering to the frustoconical section,
• a second cavity,
• a passageway connected between the cylindrical section of the first cavity and the second cavity, and
• first and second openings to the interior of the body, wherein the first and second openings are respectively defined by opposite first and second ends of the body, wherein the first opening is contiguous with the first cavity, and the second opening is contiguous with the second cavity;
• a first closure mounted proximate a first end of the body for closing the first opening;
• and
• a second closure mounted proximate a second end of the body for closing the second opening.