Some problems;
1. Many prescription and non-prescription medications show as false positives of THC (marijuana's active ingredient) including such commonly used over the counter meds like Ibuprofen (Motrin, Nuprin, Excedrin IB & Advil), Naproxen (Aleve), Ketoprofen (Orudis KT) and some preparations of riboflavin (vitamin B2).
2. You cna get a positive hit on tests for opiates by simply eating a poppyseed roll for breakfast. Yes; there is a small amount of opium in poppy seeds and the most commonly used tests are sensitive enough to pick it up. The false positive can persist for 24 hours or longer, depending on your individual physiology.
Other meds that can cause false hits for opium are ephedrine (pseudophed), Nyquil, Contact, Robitussin cough syrups, Dexatrim, Vicks inhalers, Afrin, Bronkaid tablets (for asthmatics) etc. etc. Even some ADHD meds like Cylert can cause false positives, and given the number of kids being treated for ADHD....
3. Medical conditions like kidney disease, diabetes and some liver conditions can also cause false positives for cocaine. So can the antibiotic Amoxicillin and drinks like tonic water.
4. Diazepam (Valium; a tranquilizer and muscle relaxant often given after injuries) often tests positive for PCP, an animal tranquilizer that can cause psychotic side effects. So does the active ingredient in many cough medicines like Robitussin DM: dextromethorophan.
If only things were simple....
Dr. Mordrid
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