Preparing for the Patch Test
- Your skin on the back should be clear from rashes for 2 weeks before the test if possible.
- Avoid exposing your back to the sun for 1 week before the testing.
Stop these medicines for 14 days before the test:
- Oral corticosteroids. You must be off oral cortisone (prednisone) for at least 2 weeks prior to initial testing.
Stop these medicines for 7 days before your appointment:
- topical steroids to the back
Stop these medicines for 3-5 days before the test:
- Non-steroid anti-inflammatories
The manufacturer of TRUE patch test also advises to stop antihistamines.
Do not apply any ointments, creams or lotions to the back 4 hours before the appointment.
References:
Effect of oral steroids on immunizations, allergy skin tests, and patch tests. AAAAI Ask the Expert, 2012.
http://www.aaaai.org/ask-the-expert/effect-of-oral-steroids-immunizations.aspx
Allergy Patch Skin Testing - National Jewish Health
http://www.nationaljewish.org/programs/tests/allergy/allergy-patch-skin-testing
Patch Skin Testing - Cornell Dermatology
http://www.cornelldermatology.org/static_local/pdf/031111_Patient_Patch_Testing_Handout_FINAL.pdf
TRUE patch test
https://www.truetest.com/PhysicianPDF/File3.pdf
https://www.truetest.com/TRUE_TEST_Reference_Manual_Final_2012.pdf
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