Pen needle magazine

An attachable needle assembly for use on a medication delivery pen, the needle assembly comprising:

• a spike that is configured to pierce a reservoir septum of the medication delivery pen;
• a needle guide secured to the spike and configured to engage the medication delivery pen, the needle guide enclosing:
• a septum of the needle assembly defining a septum chamber, the septum chamber of the needle assembly being in continuous fluid communication with the spike;
• a plurality of needles disposed in the septum of the needle assembly;
• a plurality of sterility barriers, each sterility barrier corresponding to and enclosing a needle of the plurality of needles, each sterility barrier corresponding to and having an integrated peel tab of a plurality of integrated peel tabs, each integrated peel tab being wrapped around a portion of the needle guide, wherein
• when a selected needle of the plurality of needles is drawn out of the needle guide for use from a first position to a second position, the selected needle enters into fluid communication with the septum chamber of the needle assembly, and the sterility barrier and the integrated peel tab of the selected needle are configured to be removed to expose the needle, wherein
• the plurality of integrated peel tabs includes at least one large peel tab and a plurality of small peel tabs, the large peel tab is greater in surface area than each of the plurality of small peel tabs;
• and
• the large peel tab is wrapped over the plurality of small peel tabs.

An attachable needle assembly for use on a medication delivery pen, the needle assembly comprising:

• a spike that is configured to pierce a reservoir septum of the medication delivery pen;
• a needle guide secured to the spike and configured to engage the medication delivery pen, the needle guide enclosing:
• a septum of the needle assembly defining a septum chamber, the septum chamber of the needle assembly being in continuous fluid communication with the spike;
• a plurality of needles disposed in the septum of the needle assembly;
• a plurality of sterility barriers, each sterility barrier corresponding to and enclosing a needle of the plurality of needles, each sterility barrier corresponding to and having an integrated peel tab of a plurality of integrated peel tabs, each integrated peel tab being wrapped around a portion of the needle guide, wherein
• when a selected needle of the plurality of needles is drawn out of the needle guide for use from a first position to a second position, the selected needle enters into fluid communication with the septum chamber of the needle assembly, and the sterility barrier and the integrated peel tab of the selected needle are configured to be removed to expose the needle;
• a first integrated peel tab of a first needle is wrapped over the needle guide;
• at least a portion of a second integrated peel tab of an adjacent second needle is wrapped over the first integrated peel tab and the needle guide;
• and
• a remaining plurality of integrated tabs is sequentially wrapped over an adjacent wrapped integrated peel tab to define the order of use upon operation.

A method of operating an attachable needle assembly on a medication delivery pen, the method comprising:

• piercing a reservoir septum of the medication delivery pen with a spike;
• engaging the medication delivery pen with a needle guide that is secured to the spike;
• establishing fluid communication between the spike and a septum chamber of a septum of the needle assembly;
• disposing a plurality of needles in the septum of the needle assembly;
• enclosing each of the plurality of needles with a sterility barrier;
• providing an integrated peel tab to each of the sterility barriers, and
• wrapping each of the integrated peel tabs around a portion of the needle guide, wherein
• when a selected needle of the plurality of needles is drawn out of the needle guide for use from a first position to a second position, the selected needle enters into fluid communication with the septum chamber of the septum of the needle assembly, and the sterility barrier and the integrated peel tab of the selected needle are removed to expose the needle.