Hello doctor, My daughter is currently in recovery from heroin and my husband and I believe she is using it again. We check her UA's at home and mail the findings to a lab. We suspect that she is giving us her friend’s urine. However, I know that today she began her menses and the urine she gave us is blood tinged slightly. Our question is if the urine is clean for heroin and if the blood is not, will the urine drug screen come back negative?
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