A drug delivery system for administering preset doses of a substance such as a
drug, vaccine or the like. The drug delivery system includes a holder and a pre-filled
drug container such as a syringe which is retained in the holder. The drug container
includes a barrel for containing the substance, a movable stopper situated within
the barrel, and a blunt end having an opening through which the substance within
the barrel can be expelled. The holder includes a distal portion and a proximal
portion, each configured to accommodate the drug container, with the distal portion
being able to be assembled to the proximal portion, which acts as a plunger rod
during activation of the delivery system. A plurality of slots are provided on
the holder that permit multiple equal doses of the substance to be administered
to each nostril of the patient.