|Spacers (also called holding chambers) work with
your metered dose inhaler (MDI) to deliver inhaled medication more easily
and effectively, and can reduce side effects. They are useful for people
of all ages. When you use an MDI by itself, more of the medicine is left
in your mouth and throat, wasting your dose and causing an unpleasant aftertaste.
Spacers hold the "puff" of medicine between you and the MDI, so that you
can inhale it slowly and more completely. As a result, more of the medicine
gets into your airways.