A metered-dose inhaler gives the medicine in a fine spray. A spacer is a tube with a mouthpiece that can be attached to the inhaler. It helps more medicine get into the lungs. To use an inhaler with a spacer, follow the package directions. If you have questions about the right way to use it, ask your child's doctor.
For infants and toddlers, a mask with a spacer is used. Your child's doctor can show you the best way to use an inhaler with a mask.