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Cotten SW, Duncan DL, Burch EA, Seashore CJ, Hammett-Stabler CA. 
“Unexpected interference of baby wash products with a cannabinoid (THC) immunoassay”. 
Clin Biochem. 2012 Jun 22;45(9):605-9.
The results of newborn drug screening have far-reaching impact not only in healthcare, but also in the legal domain. Therefore, the accuracy of these results cannot be undervalued. When false positive cannabinoid (THC) screening results for this population were suspected at our institution, a multidisciplinary approach was initiated to evaluate the screening process for any pre-analytical or analytical sources of error or interference.
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Jun 22, 2012 11:40
News about false positives in newborns #

Commonly used baby soaps and shampoos, including products from Johnson & Johnson, Aveeno and CVS, can trigger a positive result on newborns’ marijuana screening tests, according to a recent study. A minute amount of the cleansing products in a urine sample — just 0.1 milliliters or less — was found to cause a positive result.

Researchers at the University of North Carolina, Chapel Hill, began studying the issue after an unusually high number of newborns in their nursery began testing positive for marijuana exposure. Newborn screening for marijuana at hospitals, particularly among babies of women who are considered at high risk of drug use, is not uncommon: at U.N.C. Chapel Hill, 10% to 40% of newborns are tested.

Positive results can precipitate an investigation by child welfare authorities. “We really did this to help protect families from being falsely accused,” study co-author Dr. Carl Seashore, a pediatrician in the U.N.C. Chapel Hill newborn nursery, told My Health News Daily...

Baby soaps and shampoos trigger positive marijuana tests, By Maia Szalavitz - – Tue, Jun 19, 2012

Baby soaps and shampoos trigger positive marijuana tests, By Maia Szalavitz - – Tue, Jun 19, 2012
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