Hey guys,

Well the sub is not an option because I dont know anyone that would be willing to give me their *ahem* urine. However, If I can I will def look into it...

Now, I have been doing some other research and have come upon this website from another person on this message board.

Erowid Drug Testing Vaults : Misc Info

Relevant Info Below:

[2] focuses on the use of Visine to prevent pot metabolite detection. Hereis 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.