What To Expect: This testing is done on the forearms and generally takes 15-20 minutes. A small amount of liquid allergen is placed on the forearm and pricked under the skin. This procedure is painless, but will become itchy if an allergy is present.
Preprocedure: Avoidance of all antihistamines for 2-7 days is necessary for the testing to react properly. These include Claritin, Allegra, Benadryl, Clarinex, Zyrtec and Xyzal to name a few.
Postprocedure: Positive allergens may be itchy for a couple of hours following the procedure, you may take an antihistamine and use hydrocortisone cream for any increased itching.