Final answer:
Cromolyn sodium is contraindicated in the treatment of acute asthma exacerbations because, unlike albuterol and levalbuterol HFA, it's not a bronchodilator and doesn't provide immediate relief of symptoms.
Step-by-step explanation:
The medication contraindicated in the treatment of asthma exacerbations is cromolyn sodium. During an asthma exacerbation, the primary goal is to quickly open the airways, which is effectively done with bronchodilators such as albuterol and levalbuterol HFA, both of which are fast-acting drugs to relieve symptoms. Ipratropium is also used in asthma management, particularly when added to albuterol for severe exacerbations. In contrast, cromolyn sodium is not a bronchodilator; it is used for the long-term prevention and control of mild persistent asthma and is not helpful in acute attacks.