The article is a commentary expressing concern on a 2006 case report by Gideon Koren and colleagues on the pharmacogenetics of morphine poisoning in a breastfed newborn of a mother prescribed codeine.[1][4] After the publication of the case report in 2008, D. Nicholas Bateman and colleagues expressed concerns about the interpretation of the data.[1] The editors of The Lancet then published an exchange of correspondence and an accompanying commentary.[1] In 2020, further doubts about the credibility were raised by David N. Juurlink, who requested that the document be pulled from Miniview.[1] The document was subsequently withdrawn.[1] Juurlink reasoned that it was unlikely that the infant's death was caused by codeine-laced breast milk.[1]