Disclosed is a device for delivering a medicament to a patient in need of pain relief through a nasal passage into a region substantially medial and/or posterior and/or inferior to a sphenopalatine ganglion of the patient. The device includes an injector including a first end configured to remain outside a nasal passage of the patient and a second end configured for entry into the nasal passage of the patient. An introducer is configured for engagement with a nostril of the patient, wherein the introducer includes a passageway configured for slidably receiving the injector, and the passageway slidably receives a syringe within the introducer. The introducer comprises a curvature along a portion thereof adjacent to and surrounding a distal length of the passageway. The injector is moveable, relative to the introducer, between a storage position and an engaging position. A housing of the introducer, has a first end of the housing that is configured to remain outside a nasal passage of the patient and wherein a second end of the housing comprises the curvature portion of the introducer. The injector comprises a flexible tube configured to adopt at least a portion of the curvature of the passageway. The injector comprises one or a plurality of apertures along a side of the flexible tube adjacent to the second end.
