Inhaler therapy: Types of device

Question 1

pMDI

Answer 1

Advantages: Small, easy to transport, cheap
Disadvantages: Require co-ordination, cold-Freon effect may reduce use (due to propellent)

Question 2

Breath activated inhalers

Answer 2

Advantages: Do not require as much coordination as pMDI
Disadvantages: Larger to carry, cold Freon effect

Question 3

Soft mist inhalers

Answer 3

Advantages: Easy use for patients with dexterity impairments, clear dose counter
Disadvantages: Expensive, mainly only available for anti-muscarinic drugs

Question 4

Dry powder inhalers (DPI)

Answer 4

Advantages: No propellent, does not require coordination for administration
Disadvantages: Young and elderly may not be able to breathe in strongly enough to inhale the powder

Question 5

Spacer devices

Answer 5

Advantages: Avoids coordination issues, increases amount of drug reaching the lung
Disadvantages: Bulky, medication may deposit within the spacer