👉 The term "antihistaminic" refers to a medication that is used to reduce symptoms of allergic reactions, such as sneezing and runny nose. It works by blocking the action of histamine, a chemical produced by the immune system in response to an allergen, which can cause these symptoms. Antihistamines work by reducing the production of histamine, which can help relieve allergy symptoms like sneezing, congestion, and itching. They are commonly used for treating allergic
