Non Drowsy Antihistamine

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Oral Allergy Syndrome

allergy Oral Allergy SyndromeOral Allergy Syndrome (OAS) is caused by a cross-reactivity between specific proteins in foods and their corresponding components in commonly inhaled allergens.   The cross reactivity often occurs in individuals with high levels of sensitivity to seasonal allergens such as rag-weed or pollen, and manifests itself when individuals experience symptoms towards foods such as fruits and nuts.

The following list, taken from wikkipedia, demonstrates some of the cross reactivity:

  • Aler pollen: almonds, apples, celery, cherries, strawberry, raspberry
  • Birch pollen: apples, apricots, avocados, bananas, carrots, celery, cherries, nectarines, parsley, parsnips, peaches, pears, peppers, plums, potatoes, prunes, soy, strawberries, wheat
  • Grass pollen: tomatoes, oranges
  • Ragweed pollen : banana, cantaloupe, cucumber, green pepper, paprika, sunflower seeds/oil, honeydew.

Generally this syndrome presents with individuals that exhibit signs of allergic inflammation such as atopy or eczema. People who have OAS often experience tingling, swelling, congestion and other symptoms of allergy when they consume the offending food.  Their reactions are often exacerbated during seasons when pollen counts are high, or when related inflammatory conditions are active.

To treat this allergy syndrome, management of the symptoms is the preferred course of action.  This means being award of pollen counts and staying in doors accordingly.  Management of symptoms being through the use of antihistamines and other anti-allergy medication.

For many suffering from this condition, the consumption of highly-processed versions of the offending food does not trigger symptoms.  This can allow many sufferers to enjoy what would otherwise cause severe discomfort.  However, the foods in the raw or even cooked form can cause issue, and should generally be avoided.


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