A device adapted to dispense a drug or medicament in pellet form, comprising: a plurality of pellets providing an oral dosage form; a cartridge comprising a chamber containing the plurality of pellets and a screw pump, wherein the screw pump is configured to receive the pellets from the chamber and, upon rotation of the screw pump, transport the pellets from the chamber to be dispensed from the device via the screw pump; and a rotating member extending through the cartridge and configured to rotate the screw pump so as to dispense the pellets therefrom, wherein the cartridge further comprises a tapered portion configured to guide the pellets contained within the chamber into the screw pump for dispensing from the device via the screw pump as aforesaid, wherein the screw pump is located outside of the tapered portion of the cartridge, wherein the screw pump comprises a screw thread, and the screw thread cooperates with an inner cylindrical surface of the cartridge to form the screw pump, such that, as the rotating member rotates in use, the screw thread rotates within the inner cylindrical surface, causing pellets contained within the chamber to enter the screw thread, and travel down the screw thread for dispensing from the screw pump, wherein the cartridge comprises an exit tube that extends from the tapered portion of the cartridge, and the exit tube contains the screw pump, wherein the screw pump is displaced from a confluence of the tapered portion and the exit tube, wherein the inner cylindrical surface of the exit tube forms the inner cylindrical surface of the cartridge which cooperates with the screw thread. a plurality of pellets providing an oral dosage form; a cartridge comprising a chamber containing the plurality of pellets and a screw pump, wherein the screw pump is configured to receive the pellets from the chamber and, upon rotation of the screw pump, transport the pellets from the chamber to be dispensed from the device via the screw pump; and a rotating member extending through the cartridge and configured to rotate the screw pump so as to dispense the pellets therefrom, wherein the cartridge further comprises a tapered portion configured to guide the pellets contained within the chamber into the screw pump for dispensing from the device via the screw pump as aforesaid, wherein the screw pump is located outside of the tapered portion of the cartridge, wherein the screw pump comprises a screw thread, and the screw thread cooperates with an inner cylindrical surface of the cartridge to form the screw pump, such that, as the rotating member rotates in use, the screw thread rotates within the inner cylindrical surface, causing pellets contained within the chamber to enter the screw thread, and travel down the screw thread for dispensing from the screw pump, wherein the cartridge comprises an exit tube that extends from the tapered portion of the cartridge, and the exit tube contains the screw pump, wherein the screw pump is displaced from a confluence of the tapered portion and the exit tube, wherein the inner cylindrical surface of the exit tube forms the inner cylindrical surface of the cartridge which cooperates with the screw thread.