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What Is a Pressurized Metered-Dose Inhaler pMDI

What Is a Pressurized Metered-Dose Inhaler (pMDI)  [Pg.338]

The pMDI (Fig. 1) delivers a metered dose of a CFC or HFA drug suspension or solution. It consists of three major components  [Pg.338]

A reservoir, containing drug suspended or dissolved in liquefied gas propellant [Pg.338]

A metering valve, which when depressed delivers a known volume [Pg.338]

A spray actuator, which, combined with the stem of the metering valve, comprises a twin orifice expansion chamber and spray nozzle [Pg.338]



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