azelastiini

Azelastine is a medication primarily used to treat allergic rhinitis and allergic conjunctivitis. It belongs to a class of drugs known as antihistamines, specifically a second-generation H1 antagonist. Azelastine works by blocking the action of histamine, a substance released by the body during an allergic reaction. Histamine is responsible for many of the symptoms associated with allergies, such as itching, sneezing, runny nose, and watery eyes.

In the form of nasal spray, azelastine is effective in relieving nasal congestion, sneezing, itching, and runny nose. When used as eye drops, it helps to alleviate itching and redness in the eyes caused by allergies. Its mechanism of action involves not only blocking histamine receptors but also stabilizing mast cells, which are involved in the release of histamine and other inflammatory mediators.

Azelastine is generally well-tolerated, with common side effects including drowsiness, headache, and a bitter taste in the mouth when used as a nasal spray. It is available by prescription in many countries. The onset of action is typically rapid, providing relief from allergic symptoms within a short period after administration. It is important to use azelastine as directed by a healthcare professional.