antihistaminic

Example:Taking antihistamine before going outside can help prevent allergic reactions.

Definition:A substance that counteracts the effects of histamine, often used to relieve symptoms of allergies and itching.

Example:The patient undergoes a treatment of desensitizing to ragweed pollen.

Definition:The process of reducing or eliminating an allergic reaction to a substance, often through the administration of small, increasing doses of the allergen.