Joseph A. DiConcetto, MD  
Frequently Asked Questions
Intradermal Skin testing

Procedure Description:
Intradermal skin testing for allergies

What To Expect:
A small amount of multiple allergens is injected just under the skin. The procedure takes about 15-20 minutes and will become read and itchy with positive reactions.

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.

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.