An injectable medication security device, comprising: a recess provided on a first portion of the device, wherein the recess is configured to receive and couple to a neck portion of a vial containing the injectable medication; an opening provided on a second portion of the device, wherein the opening permits access to a penetrable cover located near the neck portion of the vial when the vial is coupled to the recess of the device; at least one aperture located at the opening and configured to control access to the opening, wherein the at least one aperture comprises a plurality of pieces (306-1, 306-2, 306-3) configured to move relative to one another to open or close the at least one aperture; and a depressible switch provided on an outer side portion of the device and operatively coupled to the at least one aperture, wherein the depressible switch is configured such that depression of the depressible switch causes the at least one aperture to open and provide access to the opening, thereby permitting the medication to be drawn from the vial, and release of the depressible switch causes the at least one aperture to lock and close the opening, thereby preventing further access to any residual medication within the vial, wherein: the depression of the depressible switch directs a relative movement of the plurality of pieces away from one another to open the at least one aperture; and/or the release of the depressible switch directs a relative movement of the plurality of pieces towards one another to close the at least one aperture. a recess provided on a first portion of the device, wherein the recess is configured to receive and couple to a neck portion of a vial containing the injectable medication; an opening provided on a second portion of the device, wherein the opening permits access to a penetrable cover located near the neck portion of the vial when the vial is coupled to the recess of the device; at least one aperture located at the opening and configured to control access to the opening, wherein the at least one aperture comprises a plurality of pieces (306-1, 306-2, 306-3) configured to move relative to one another to open or close the at least one aperture; and a depressible switch provided on an outer side portion of the device and operatively coupled to the at least one aperture, wherein the depressible switch is configured such that depression of the depressible switch causes the at least one aperture to open and provide access to the opening, thereby permitting the medication to be drawn from the vial, and release of the depressible switch causes the at least one aperture to lock and close the opening, thereby preventing further access to any residual medication within the vial, wherein: the depression of the depressible switch directs a relative movement of the plurality of pieces away from one another to open the at least one aperture; and/or the release of the depressible switch directs a relative movement of the plurality of pieces towards one another to close the at least one aperture. the depression of the depressible switch directs a relative movement of the plurality of pieces away from one another to open the at least one aperture; and/or the release of the depressible switch directs a relative movement of the plurality of pieces towards one another to close the at least one aperture.