What exactly does an asthma inhaler do?

What happens if someone uses a ventolin inhaler without asthma?

• What will happen if someone without asthma uses a Ventolin inhaler? Just wondering because I sometimes use my emergency inhaler before gym class, just to prevent attacks. Is that even the same as someone without asthma? Thanks

• Answer:

  Many people use it just like you do. Usually because they have exercise induced asthma. It fine to use it that way. It's better than having an asthma attack, this way your preventing it from occurring.