How long does an asthma attack last?

Depends: Asthma attacks, or acute bronchospasm, can last as little as a few minutes for minor attacks that are treated promptly. In come cases the asthma attack is so severe that the patient is hospitalized, put on a breathing machine and can potentially die. The length of asthma attacks are variable and there really is not set answer.

Varies...: Asthma exacerbation can last for a few minutes to a few days to weeks depending on the degree of bronchospasm and inflammation and how it responds to routine therapy. The earlier in the exacerbation a person seeks help, the sooner it typically responds.