Which of the following is NOT a medication typically used for treating the acute bronchoconstriction aspect of asthma?

Fluticasone is not typically used for treating acute bronchoconstriction in asthma. Instead, it is a corticosteroid that is primarily used for long-term management and control of asthma symptoms. By reducing inflammation and preventing asthma attacks, Fluticasone plays a crucial role in a maintenance regimen rather than providing immediate relief during an acute asthmatic episode.

On the other hand, the other medications listed—Albuterol, Isoproterenol, and Metaproterenol—are bronchodilators that directly target the bronchoconstriction aspect of asthma. They work by relaxing the muscles in the airways, thereby allowing for easier breathing during an asthma attack. Albuterol is a commonly used short-acting beta-agonist, while Isoproterenol and Metaproterenol also belong to this class and are used for their rapid bronchodilator effects. Thus, Fluticasone stands out as an agent focused on long-term control rather than acute relief.