Diseases affecting the lungs—such as asthma, emphysema, chronic bronchitis, and chronic obstructive pulmonary disease (COPD)—share many of the same medicines. These medicines are often delivered through a metered-dose inhaler (MDI).

Using an MDI:

• Delivers most of a measured dose of medicine directly to your lungs.
• Can help keep your symptoms under control and minimize long-term damage to your lungs.
• May prevent or reduce side effects of the medicine.
• May let you use less medicine than is found in a pill but get the same effect.
• May result in the medicine working faster than a pill form.

 What is a metered-dose inhaler?
 Why should I use a metered-dose inhaler?
 How to use a metered-dose inhaler
 Where to go from here