Page 177 - COMMUNITY PHARMACY PRACTICE

02/04/2024

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Bronchoconstriction associated with using MDI

qBronchospasm may be due to:

• The propellants in the MDI(CFC)
• Benzalkonium chloride preservative

qThe patient may be advised to

• Switch to dry powder inhalers
• Switch to a hydrofluoroalkane metered-dose inhaler.
• Use a spacer

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Powdered and MDI aerosols

qDry powder inhalers (DPIs) have several advantages over
MDIs
• Breath-activated (do not need co-ordination )
• It has no propellant

BUT

• people suffering acute attacks may be unable to produce enough
airflow to use dry-powder inhalers successfully.

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