Which medication is classified as a leukotriene modifier for allergic rhinitis?

The medication classified as a leukotriene modifier for allergic rhinitis is Zileuton. Leukotrienes are inflammatory mediators involved in allergic reactions and asthma. Zileuton works by inhibiting the enzyme lipoxygenase, which is responsible for the production of leukotrienes. By blocking this enzyme, Zileuton reduces the levels of leukotrienes in the body, thereby alleviating symptoms associated with allergic rhinitis, such as nasal congestion, sneezing, and runny nose.

This mechanism of action makes Zileuton effective in managing symptoms related to both allergic rhinitis and asthma. Other medications listed, such as scopolamine, cromolyn sodium, and ephedrine, do not function in the same manner or target leukotrienes specifically, which is why they are not classified as leukotriene modifiers.