For example, a soil with a pH of 5.5 is ten times more acid than a soil with a pH 6.5, and a soil with pH of 4.5 is 100 times more acid than the soil with a pH of 6.5. Similarly, for every whole unit increase in pH above 7, there is a ten-fold increase in alkalinity.
This document, leaked by a disillusioned company employee, lists more than 250 over-the-counter medications and prescription drugs that can cause false positives. Substances that cause False Positive Drug Test Results THC - Substances or Conditions which can cause false positives Dronabinol (Marinol) Ibuprofen; (Advil, Nuprin, Motrin, Excedrin IB etc) Ketoprofen (Orudis KT) Kidney infection (Kidney disease, diabetes) Liver Disease Naproxen (Aleve) Promethazine (Phenergan, Promethegan ...
Of the 2 samples that were positive due to NSAID use, one was from acute ibuprofen use (1,200 mg in one day), and the other was from chronic naproxen use (1,000 mg daily for no longer than 30 days).9 This study shows it is unlikely for NSAIDs to cause a false-positive marijuana UDS.