There are four major reasons why your health care professional might prescribe nebulizer therapy: 1) cognitive impairment - such as a memory problem (dementia) or confusion; 2) problems with use of hands - such as arthritis of the hands and wrists or tremor; 3) difficulty coordinating release of the medication from the device, not inhaling correctly, and not holding your breath long enough; and 4) a low inspiratory force required to break up and then inhale powder particles out of a dry powder inhaler.