Clarinex is a medication that is available as an over-the-counter drug. The drug's action is to reduce __________.

Clarinex, known generically as desloratadine, is an antihistamine that is primarily used to alleviate allergy symptoms. Its mechanism of action involves blocking histamine receptors, which play a significant role in the body's allergic responses. By interfering with the effects of histamine, Clarinex helps reduce symptoms such as sneezing, runny nose, itchy eyes, and other common allergic reactions. This makes it particularly effective for individuals suffering from seasonal allergies or allergic rhinitis.

Other options pertain to different therapeutic categories; for instance, medications that address stomach upset, pain from arthritis, or gas do not relate to the action of Clarinex. Each of those conditions requires different types of medications targeting digestive issues, pain relief, or gastrointestinal discomfort, which highlights the specific purpose and action of Clarinex as relevant to allergy management.