A cannula (24) for administration of a medicine to a target location (26) includes a tube 40 ()with at least one nodule (50) disposed along the circumferential surface (46) and spaced at a defined distance (54) from the distal end (42) of the tube (40). An arrangement (20) for delivery of a medicine to a target location (26) includes the cannula (24) and a pump (22) fluidly coupled to the cannula (24). The distal end (42) of the cannula (24) may be inserted into a target location (26) until the nodule (50) reaches a surface (46) that limits a depth of penetration before delivery of the medication.
