What does a spacer do when used with an inhaler?

A spacer is a device used in conjunction with a metered-dose inhaler, and its primary function is to enhance the delivery of medication directly to the lungs. When an inhaler is used without a spacer, a significant portion of the medication can end up in the mouth and throat instead of reaching the airways. The spacer acts as a holding chamber for the aerosolized medication, allowing the patient to inhale slowly and more deeply. This results in better coordination between actuation of the inhaler and inhalation, which maximizes the amount of medication that successfully enters the lungs.

Using a spacer can be particularly beneficial for individuals who have trouble using inhalers correctly, including children and elderly patients. By ensuring that more of the medication is delivered where it is needed, spacers improve the effectiveness of the treatment, helping to manage respiratory conditions more efficiently.