[ontheroad]

Here are the sources for that info.

[1] "Adulterants Causing False Negative in Illicit Drug Testing"
Clinical Chemistry, Nov 1988, Volume 34, Number 11, p 2333-2336.
Stephen L. Mikkelsen and K. Owen Ash

[2] "Mechanism of False-Negative Urine Cannabinoid Immunoassay Screens by
Visine Eyedrops"
Clinical Chemistry, Apr 1989, Volume 35, Number 4, p. 636-638.
Stephen D. Pearson, K. Owen Ash, and Francis M. Urry

Also, I am a truck driver and have had to piss test numerous times. I have passed EVERY time using 5-6ml of visine. I first heard about the trick in a book called "Urine Trouble" by Dr. Kent Holtorf, M.D. Visine has passed the EMIT test every time, but the other tests are debatable. Nevertheless, the EMIT test is the most used test by clinics because it is the cheapest, simplest to perform and the most widely used of the immunoassays. Unfortunately, it is also the easiest to fail and more worryingly, the least accurate: giving a
4-34% false positive rate. But like I said, I have used visine multiple times and it has worked. Not only that, but do you know what is in those $30 additive kits you can buy online to pass UAs? The same chemicals as visine!!