How exactly do inhalers work?

Dig into the science of inhalers, and find out how these devices treat common respiratory conditions like asthma and COPD.

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Inhalers are mainly used to treat two conditions: asthma and chronic obstructive pulmonary disease, or COPD. And there are two main types: preventative inhalers and rescue inhalers. Preventative inhalers can be used every day to control symptoms, while rescue inhalers are great in an emergency. So, how do they work? Anna Rothschild explains the science behind these simp