Table 3.

Common errors with inhaler use

Device type	Specific devices	Common errors
Metered-dose inhaler3,6,7,25,26	All metered-dose inhaler devices	Not shaking device prior to use Not removing the mouthpiece cover Not holding breath for the required time frame Not waiting 30 seconds between doses if more than one dose is required Not getting a good seal with the mouthpiece Not coordinating actuating the device and inhaling at the same time
Dry powder inhaler3,6,7,17,19-23,37	All dry powder inhaler devices	Not achieving a strong, deep, forceful inspiration Not holding breath for the required time frame Exhaling into the device Not holding the device steady once dose is prepared
	Diskus	Playing with the lever that loads the dose; will result in loss of doses
	Ellipta	Covering the air intake vents
	Genuair	Not completely releasing the orange or green button prior to inhalation
	Turbuhaler	Holding the mouthpiece when turning the grip
Capsule-containing inhalers3,6,12-15,23	All capsule-containing inhalers	Swallowing capsules Inserting the capsule into the mouthpiece and not the capsule chamber Piercing the capsule more than once Exhaling into the device Not holding breath for the required time frame Not holding the device steady once dose is prepared Covering the air intake vents
Other	Soft mist inhaler 27-29	Failing to properly open the lid by the side of tab of the lid and inadvertently losing the dose Covering the air intake vents on the mouthpiece Not taking a slow, deep breath, breathing in as deeply and for as long as is comfortable Not holding breath for the required time frame
	Nebulizer3,6,7	Not getting a good seal with the mask Failing to properly clean the machine
	Diskhaler17	Not piercing both sides of the blister with the needle Not holding breath for the required time frame