Visine Does Work!!!
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 / L was the amount
of Visine used per amount of urine specimen with 122 ug / L of
9-carboxy-THC in the sample.
[2] focuses on the use of Visine to prevent pot metabolite detection. Here
is a table summarizing the effectiveness of varying concentrations of
Visine:
Visine concentration (mL / L) : 0 10 20 50 100 200 300
Apparent 9-carboxy-THC concentration (ug / L) : 100 52 43 47 35 85 87
(Note the positive test cutoff value is 50 ug / L 9-carboxy-THC).
The interesting thing to observe is the effectiveness of Visine as THC
metabolite masker decreases as its concentration goes up past a certain
point. The same pattern occured with the TDx and Abuscreen assays (the TDx
assay generated false negatives, but the Abuscreen assay's apparent
metabolite value fell only to 52 ug / L). The lesson to be learned is the
optimum amount of Visine to use is around 100 mL / L.
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."
To use this information to your advantage, figure that the standard urine
specimen is 60 mL. At 100 mL / L Visine recommended, this means 6 mL of
Visine would cut the observed 9-carboxy-THC almost two-thirds. Visine comes
in 15 mL and 30 mL bottles. For advice on how to add the adulterant, read
Abbie Hoffman's book on piss-testing, _Steal this Urine Test_. Use of other
methods (such as diluting your urine by frequent water drinking) should be
researched. Adding adulterants can be risky and should be seen as a
last-ditch effort if you're caught with your pants down, so to speak.