Message-ID: <022309Z20081993@anon.penet.fi>
Newsgroups: alt.drugs
From: an13187@anon.penet.fi (H-Man)
Date: Fri, 20 Aug 1993 02:17:49 UTC
Subject:  VISINE to beat POT PISS-TESTS pt. 2

I posted a message the other day about using VISINE to cause false-negative
POT PISS-TESTS.  Well, I came down this morning and found that I was under a
viaduct right near the university library, so I cleaned myself off a bit in
nearby FOUNTAIN and ambled in for some further research.  Here is a review
of two articles concerning false-negatives through SPECIMEN alteration with 
EYE-DROPS and a bit of speculation about how to use this information.

Please respond with COMMENTS or CRITICISMS.

  |--########>--  H-Man  --<########--| [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 [1] describes the effects of 8 different urine-additives (table salt, Visine, handsoap, Drano, bleach, vinegar, goldenseal tea, and lemon juice) on the outcome of various drug tests. Every effective additive except Visine leaves an easily detected telltale sign: Drano, bleach and vinegar change the specimen's pH outside the normal range; goldenseal tea causes the specimen to turn brown; soap causes the specimen to become cloudy; and table salt forces the sample's relative density out of the normal range. Lemon juice did not affect the tests. The abstract notes: "Visine was the only adulterant not detected." [2] says that Visine does slightly reduce the urine sample's abaility to foam. Visine caused false negatives (EMIT d.a.u. assays) in the tests for benzodiazepines and marijuana, but did not change the test results for amphetamines, barbituates, cocaine, or opiates. 125 mL/>

> 
> The ingredients of Visine responsible for the blocking of the THC test are
> given as benzalkonium chloride (a preservative) and the borate buffer.  The
> mechanisms of the borate buffer were not discussed, but "reduced
> availability of 9-carboxy-THC in urine samples adulterated with Visine is
> due in part to uptake of 9-carboxy-THC into benzalkonium chloride micelles."
> 

If this is the mechanism and it becomes established, there probably would
be a street market for Zephirin aqueous.  It comes highly concentrated, and
it is used as an antiseptic/surgical scrub, etc.  The concentrate would
have
to be diluted appropriately.  There are several less concentrated alcoholic
sprays and tinctures.  I suspect the alcohol would be quickly detected,
however.