An inhaler spacer is a plastic tube with a mouthpiece on one end. An inhaler attaches to the other end. The spacer is a holding chamber that delivers the medication more slowly and makes it easier to inhale. A spacer is especially helpful for children or other people who find it difficult to use an inhaler by itself. Using an inhaler alone can cause most of the medicine to collect inside your mouth or stomach instead of your lungs. An inhaler spacer delivers medicine more effectively, allowing you to receive maximum benefits from your medication.