oa SA Pharmacist's Assistant - Allergic rhinitis : allergies
Allergic rhinitis is defined as the inflammation of the inner lining of the nose. It occurs as a result of an inflammatory response to tiny airborne particles, called allergens. The allergic reaction results in the activation of two types of inflammatory cells called mast cells and basophils. These cells produce inflammatory substances, such as histamine and leukotrienes, which cause fluid build-up in the nasal cavity, irritation, sneezing and a runny nose.
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