HFA Asthma inhalers

June 18, 2008 by Kenneth Carlson, MD 

InhalerMetered dose inhalers (MDI’s) are being changed from a CFC propellant (old ones) to the newer HFA propellant. HFA inhalers are different from CFC inhalers:

HFA inhalers have a finer mist (smaller particles). You will probably feel and taste less of the medicine. The smaller particles are easier to inhale and can move better and deeper into your airways, (compared to CFC).

Cleaning the inhaler: (to be done once a week)

The medication is more sticky - and can clog the exit hole. Read and follow cleaning instructions on the insert with your HFA inhaler.

Take the metal canister out of the plastic case
# Wash the plastic case, running warm water through the case (top to bottom)
# Shake off excess water.
# Air dry.
# Put the plastic case and metal canister back together after completely dry.

NEVER IMMERSE THE METAL CANISTER IN WATER!

Priming the inhaler: (spraying into room- away from your face)

Priming is important to ensure accurate dosing: should be done before using a new inhaler. This varies with the different brands of albuterol. Also, if Ventolin© brand is dropped, it will need priming again.

ProAir HFA© (albuterol)

  • Before first dose: 3 sprays to clear opening
  • After 2 weeks of no use: repeat 3 sprays

Proventil HFA© (albuterol)

  • Before first dose: 4 sprays to clear opening
  • After 2 weeks of no use: 4 sprays

Ventolin HFA© (albuterol)

  • Before first dose: 4 sprays to clear opening
  • After 2 weeks of no use: 4 sprays
  • When dropped: 4 sprays again to clear
  • After washing: 1 spray

Further Information

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