Question: proair hfa how to use?
Answer: Shake the inhaler well and test spray it in the air 3 times for ProAir® HFA or 4 times for Proventil® HFA before using it for the first time or if the inhaler has not been used for more than 2 weeks. To inhale this medicine, breathe out fully, trying to get as much air out of the lungs as possible.