Allergies occur when the body's immune system responds to a substance it considers an "invader." Substances that provoke the immune system into an allergic response are known as allergens. There is no such thing as a universal allergen. What might trigger a life-threatening allergic response in one person might cause absolutely no harm in another.
The physiological mechanism of allergic reactions is the same, however, in everyone. Allergens enter the body — either through ingestion, inhalation or contact with the skin or mucous membranes. This causes white blood cells to release an antibody which then binds to what are known as mast cells. The mast cells rupture – and in the process, release biochemical substances including histamine.
Mild allergy symptoms include itchy, watery eyes, a runny nose, scratchy throat and a rash. More severe, life-threatening allergy symptoms include swelling of the throat, wheezing and difficulty breathing.
Allergy medications are available as pills, liquids, inhalers, nasal sprays, eye drops, skin creams and shots (injections). Some are available over-the-counter; others are available by prescription only.
Pills and liquids
Oral antihistamines, available over-the-counter and by prescription, ease a runny nose, itchy or watery eyes, hives, swelling, and other signs or symptoms of allergies. Because some of these drugs can cause drowsiness and fatigue, take them with caution when you need to drive or do other activities that require alertness.
Antihistamines that tend to cause drowsiness include:
Aircet: Reduce sneezing & water rhinorrhea
Improves nasal airflow
Indication: Chronic Allergic Conditions, Perennial Rhinitis Aircet-F: Reduces the need for inhaled corticosteroids
Treats Seasonal allergies, such as bay fever and chronic hives
Indication: Hay fever, chronic idiopathic Urticaria