Omron A3 Complete Nebulizer can allow the medication start acting faster than taking pills or injections. For an inhaled medication to be most effective it should be targeted directly to the area that needs to be treated. To reach different target areas of the airway tract (for example upper and lower airways) a different droplet size of the medication is needed. By changing the nebulization position between 1 to 3, the particle size of the aerosol will change, so that the medication can be targeted towards the different parts of the airways.