5 Jan 2010
The following drugs can cause a false positive on THC:
Ibuprofen; (Advil, Nuprin, Motrin, Excedrin IB etc)
Ketoprofen (Orudis KT)
Kidney infection (Kidney disease, diabetes) Liver Disease
Promethazine (Phenergan, Promethegan)
Riboflavin (B2, Hempseed Oil)
I hope this help! Good Luck!
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