Patent ID: 8333188

Claim:
A medicine ejection apparatus which ejects a medicine for medicating a user, comprising: a medicine tank equipped with a movable stopper, said medicine tank containing the medicine; a position sensor which measures a movement amount of said movable stopper; a medicine ejecting unit which has an element that generates energy for ejecting the medicine from said medicine ejection apparatus; a drive control unit which controls a drive start and a drive stop of said element; and an ejection amount determining unit which determines a total amount of the medicine that has been ejected from the medicine ejecting unit, based on the movement amount measured by said position sensor, after said element has performed a drive stop, wherein said drive control unit enables said element to perform driving so as to eject an additional amount of the medicine calculated from a difference between the set ejection amount and the total amount of the ejected medicine when the total amount of the ejected medicine determined by said ejection amount determining unit is less than the set ejection amount.