A drug delivery system includes flexible and interchangeable nozzle and tip. In one embodiment, the present invention relates to a medical device for intranasal delivery of a medicament. The present invention effectively delivers an appropriate amount of medicament to the designated surface area. In one other embodiment., the present invention ensures that a complete dosage of the medicament is delivered, especially to specific areas in the nasal cavity such as the rear of the nasal cavity where the SPG is located.
