by Dr. Chan Lowe » Mon Mar 03, 2008 11:44 pm
Unfortunately, I don't think there is such a book. The problem is that the drug tests only look for the presence of the drug. They are of no help in determining where they came from.
The one thought I have is that a more comprehensive drug screen can be performed to look for the presence of the promethazine as well. If both are found together it would support that it came from the medicine (although again this isn't 100% since both medicines could be taken individually).
Best wishes.
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