Delivery device for delivering a drug

A delivery device for delivering a drug, comprising:

• a housing having an outlet, and a cartridge compartment configured to receive a cartridge filled with an active pharmaceutical formulation in powder form;
• a transporting mechanism configured to transport a predetermined amount of the active pharmaceutical formulation to a flushing position;
• a pumping mechanism connectable to a solvent reservoir and configured to deliver solvent from the solvent reservoir towards the outlet;
• a jetting piston configured to enter the flushing position and to produce a jet of the solvent so as to flush the predetermined amount of the active pharmaceutical formulation from the flushing position with a predetermined amount of the solvent towards the outlet;
• a fluid channel in fluid communication with the solvent reservoir and the outlet, wherein the jetting piston is moveable between a retracted position, where the fluid channel is blocked, and an extended position, where the jetting piston provides a fluid communication with the fluid channel and the flushing position;
• and
• a controller at least configured to control operation of at least one of the transporting mechanism, the pumping mechanism, the jetting piston.