What is a antihestamine?

Answer 1

An antihistamine is a type of medication that blocks the action of histamine, a substance in the body that causes allergic symptoms. These drugs are commonly used to relieve symptoms such as sneezing, itching, and runny nose associated with Allergies, hay fever, and colds. Antihistamines can be classified into two main categories: first-generation, which may cause drowsiness, and second-generation, which are less likely to cause sedation. They are available in various forms, including tablets, liquids, and nasal sprays.