Hair follicle test and blood transfusions?

I have had a blood transfusion within the past week, I have a hair follicle test coming up this month. If the person who donated blood to the hospital had done drugs in the past 3 months will it show up on a hair follicle test when I get my test done?
Asked Sep 21, 2012
Edited Sep 21, 2012
Blood used in transfusions is tested before it's used. I seriously doubt that would happen but if it does, hair follicle tests show drug use 30-90 days back and they should be able to tell whether the time frame in the hair sample fits the time frame of the transfusion.
Answered Sep 22, 2012
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Answered Apr 17, 2019

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