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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Will Smoking Weed Show In A Blood Test?

well am 120 pounds and am 14 years old thursday they are going to make a check up i dont really know if they will look for drugs or something but its for my soccer team in highschool . my coach told me to go to the doctor for the check up i smoked weed monday can i make it?
Tue, 30 Sep 2014
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Addiction Medicine Specialist,  's  Response
doesn't show up on tests that are NOT looking for it. So, if you test the blood for marijuana (never done, the urine test works better), it would show up for up to a week after one use. BUT, regular looks at blood cell count, HIV test, ekg, diabetes test, thyroid test, etc. etc... no abnormality from it.
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Will Smoking Weed Show In A Blood Test?

doesn t show up on tests that are NOT looking for it. So, if you test the blood for marijuana (never done, the urine test works better), it would show up for up to a week after one use. BUT, regular looks at blood cell count, HIV test, ekg, diabetes test, thyroid test, etc. etc... no abnormality from it.