1.Used as propellants in MDIs (metered dose
inhaler), HFAs have been shown to have a number of
advantages, list five of them?
2. Until after what age is it recommended that an MDI
(metered dose inhaler) not be used without a spacer, a breath
activated MDI , or a DPI(dry powder inhaler)?
1.Used as propellants in MDIs (metered dose inhaler), HFAs have been shown to have a number of advantages, list five of
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