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.
Effect of oral steroids on immunizations, allergy skin tests, and patch tests. AAAAI Ask the Expert, 2012.
Allergy Patch Skin Testing - National Jewish Health
Patch Skin Testing - Cornell Dermatology
TRUE patch test