Both ACAAI and AANMA urge patients and physicians to be aware that the
new HFA propelled inhalers are different than what most patients may be
used to, and, as such, education is required. Some differences include:
-- Since there are only branded products available, prescriptions and
patient instructions should be appropriate to each product.
-- The propelled spray (plume) with HFA propelled inhalers is softer than
CFC propellants and patients need to be reassured that they will be
receiving the correct dose of active ingredient.
-- HFA MDIs have different cleaning requirements. HFA MDIs need to be
cleaned more frequently than CFC MDIs. The HFA medication tends to clog
the exit port of the plastic actuator more quickly than CFCs. This
prevents medication from reaching patient's airways, which may
explain why patients sometimes report HFA inhalers aren't working.
-- HFA MDIs have different priming requirements. Priming (spraying multiple
doses into the air) loads the correct dose of medication inside the
inhaler. Each HFA inhaler has different priming instructions - how many
sprays are needed and exactly when the medication requires priming -
which can be quite different from CFC priming.
-- There may be price differences among the branded HFA products and they
will cost more than the soon to be discontinued CFC products, which
included some generic choices.
"As CFC inhalers are phased out, patients must be prepared for changes
to their usual medications," said Dennis Spangler, MD, Atlanta A
|SOURCE Allergy and Asthma Network/Mothers of Asthmatics|
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