question about when they take blood?!

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An abnormal substance will show up. It depends on the doctor if they do further testing for drugs but generally I don't think they do that unless it is ordered by the courts.

edit
probably not. They won't know what it is exactly unless they do a drug test. My strattera looks like meth in a drug test. It doesn't contain any methamphetamine but it does look like it for some reason.

drug scanning is an entirely other panel of testings. Unless your mother or doctor is suspicious, NO, they won't order those panels.

I have never been asked about any othr substances except one time for insurance purposes. I don't have a clue about the amount of test panels they ran. But it came back positive for caffeine and nicotine. Both legal substances.

They're not doing a drug test so no, it will not show up. I have had my blood drawn (not for drug testing) and had marijuana in my system but they have never said anything to me.

don't worry about it.they will only be testing for diabetes.