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Patients & Consumers Online Tools Find an Allergist / Immunologist Pollen Counts Diseases 101 Featured Resources » AAAAI Tips Brochures Topic of the Month Research for Patients Drug Guide Allergy & Asthma ADVOCATE Information Request Form Donate Now En Español Just for Kids Seniors Contact Us Search by Condition (A-Z) Request a Speaker Smoke Free Homes Referral Guidelines Other Resources En Español Just for Kids Seniors		Allergic Conditions: Metered-Dose Inhaler (MDI) A metered-dose inhaler (MDI) is a propellant-driven delivery mechanism for inhalation of asthma medications. MDIs are just one of three basic types of devices used to deliver inhaled medications. Nebulizers deliver fine liquid mists of medication through a "mask" that fits over the nose and mouth, using air or oxygen under pressure. They are frequently used to treat people with asthma who cannot use an inhaler, including infants, young children and acutely ill patients of all ages. Rotary inhalers and dry powder inhalers have been introduced to deliver asthma medication without using the propellant chlorofluorocarbon (CFC), which damages the earth’s ozone layer. Resources about metered-dose inhalers: Use of Inhaled Asthma Medications Tip Brochure  Please visit an allergist for more information on allergic disease and your individual medical condition. If you need to locate an allergist in your area, visit the Academy’s online Physician Referral Directory. <back>
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