Which of the following medications is classified as a corticosteroid?

Nasacort is classified as a corticosteroid because it contains the active ingredient triamcinolone acetonide, which is a synthetic corticosteroid used primarily for its anti-inflammatory effects. Corticosteroids are a class of steroid hormones that are produced in the adrenal cortex and play a crucial role in various bodily functions, particularly in the regulation of inflammation and immune response.

In the case of Nasacort, it is commonly used as a nasal spray to treat allergic rhinitis (hay fever) and other nasal inflammation, effectively reducing symptoms such as congestion, sneezing, and runny nose. The mechanism of action involves inhibiting the release of substances within the body that trigger allergic and inflammatory responses, providing symptomatic relief.

The other medications listed are from different classes: Glucophage is an antidiabetic medication used to control blood sugar levels in individuals with type 2 diabetes, Lopressor is a beta-blocker commonly used to manage high blood pressure and heart conditions, and Januvia is a medication for type 2 diabetes that works by enhancing the body's own ability to lower blood sugar. These medications do not share the anti-inflammatory properties and hormonal actions characteristic of corticosteroids.