Two-part electrotransport device

A corrosion-resistant electrotransport drug delivery device comprising an electrical module and a reservoir module, the electrical module and the reservoir module configured to be combined to form a unitary, activated drug delivery device prior to use,

• wherein the electrical module comprises:
• circuitry;
• a power-on counter comprising a logic flag configured to increment when the circuitry is powered on;
• an electrical output adapted to connect the circuitry to an input connector on the reservoir module when the electrical module is combined with the reservoir module;
• wherein the battery is isolated from the circuitry until the electrical module and the reservoir module are combined;
• and
• wherein the reservoir module comprises:
• an electrical input adapted to electrically connect the circuitry in the electrical module to at least a pair of active electrodes in the reservoir module when the electrical module is combined with the reservoir module;
• wherein the circuitry powers the device off, or will not power the device on, if the number of counts in the power-on counter exceeds a predetermined value.

A corrosion-resistant electrotransport drug delivery device comprising an electrical module and a reservoir module, the electrical module and the reservoir module configured to be combined to form a unitary, activated drug delivery device prior to use, wherein the device resists corrosion by electrically isolating a circuitry in the electrical module from a power source,

• further wherein the electrical module comprises:
• the circuitry;
• an electrical output adapted to connect the circuitry to an input connector on the reservoir module when the electrical module is combined with the reservoir module;
• and
• one or more power-on contacts between the circuitry and a battery;
• a first seal sealing the one or more power-on contacts before the modules are combined, the first seal being configured to maintain the sealing when the power-on contact is closed by an actuator, wherein the first seal is water- and/or particulate-tight;
• a second seal sealing the electrical output before, during and after the electrical module is combined with the reservoir module;
• wherein the battery is isolated from the circuitry by the one or more power-on contacts while the one or more power-on contacts remain open, and wherein the battery is connected into the circuitry when the one or more power-on contacts is closed by one or more battery contact actuators on the reservoir module when the electrical module and the reservoir module are combined;
• and
• the reservoir module comprises:
• an electrical input adapted to electrically connect the circuitry in the electrical module to at least a pair of active electrodes in the reservoir module when the electrical module is combined with the reservoir module;
• and
• the one or more battery contact actuators configured to close a corresponding power-on contact when the electrical module is combined with the reservoir module, such that the battery is connected into the circuitry and the device is powered on.