Using your inhaler (puffer) properly is important when you have asthma or COPD (chronic obstructive pulmonary disease). This short clip shows you how to use. Dec 10, Learn how to use inhalers extrinsicasthma.com on the images below to read more or watch how-to videos. Watch a video to follow along with the correct way to use your metered dose inhaler. Print the step-by-step instructions and keep them with your Asthma Action.