Allergy blood test does nasal spray affect results? - EFA

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Allergy blood test does nasal spray affect results?

Regul profile image
3 Replies

Hi my son is having blood allergy test and was told no anti histamines 3 days prior to the test.

Would a nasal spray affect the blood test and shouldn’t be used for 3 days either?

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Regul
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Erica74 profile image
Erica74

My son had the blood test because he had antihistamines a day before his appointment so I can’t see the nasal spray affecting the blood test so I would still give it

Regul profile image
Regul

It's strange that I've been told no anti histamine 3 days prior but according to allergy UK it shouldn't affect a blood test only the skin test.

This was the advice from a ear nose throat dr no anti histamine 3 days prior so confused

sandybrown profile image
sandybrown

Allergy test, there are many, skin prick, blood test and many more. It is always best not to have any medication before any blood test. I am 72 and did have blood test for allergy and I was asked to stop my antihistamine and I stopped my antihistamine for one week and put up with the problems! This is because I wanted to make sure blood test gave good result. My test, skin prick and blood test, was last year.

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