Allergy relief medicines are used to alleviate symptoms of allergies, such as sneezing, runny nose, itching, and watery eyes. They work by blocking the effects of histamine, a chemical released by the body in response to allergens. These medicines can be taken in the form of pills, nasal sprays, eye drops, or inhalers and are used to treat various types of allergies, including seasonal allergies, food allergies, and skin allergies. Some common allergy relief medicines include antihistamines, decongestants, corticosteroids, and leukotriene modifiers.