Antihistamines are medicines often used to relieve symptoms of allergies, such as hay fever, hives, conjunctivitis and reactions to insect bites or stings. They're also sometimes used to prevent motion sickness and as a short-term treatment for insomnia. Most antihistamines can be bought from pharmacies and shops, but some are only available on prescription. Types of antihistamine There are many types of antihistamine. They're usually divided into 2 main […]