I-nebulizer yokucindezela umoya yakhelwe ukuphumelela ekwelapheni i-asthma, izifo ezibangelwa ukungezwani komzimba, nezinye izinkinga zokuphefumula. Iyakha umoya ohamba ngomgudu womoya ocacile uye esitsheni semithi. Lapho umoya ungena esitsheni semithi, uzoguqula umuthi owabelwe ube yinkungu ye-aerosol ukuze kube lula ukuphefumula.