Types of Allergy Tests

Patch test (Ontario)

This method of testing is used to detect delayed contact allergies (AKA skin allergy) to substances such as metals, hair dyes, cosmetics, fragrance to name a few. The results often take 96 hours to develop, hence this is known as delayed allergy.

This requires 3 visits in 1 week:

- Monday (to place the patches on the back)

- Wednesday (removal of patches)

- Friday (final reading)

On Friday you will be provided with your results and a Safe-Product list.

Skin prick test

This type of testing is used to diagnose immediate environmental and food allergies. The results are obtained in 15 minutes after doing the test.

*Must stop antihistamines at least 4-5 days before the test.

**Our allergy clinic uses the allergy approved testing device called duotip for each individual allergen tested. We do not use lancets and we never wipe down the allergy skin test device between allergens. Once the device is used, it is discarded. This ensures there is no antigen carry-over and thus your results are accurate.

Intradermal test

This method of testing is used to diagnose certain types of allergies such as drug and venom allergies. The results are obtained in 15 minutes after doing the test.

*Must stop antihistamines at least 4-5 days before the test.