Meth is made of two different isomers, which are two of the same formulas, but the atoms in each are arranged differently causing different properties. These two isomers are referred to as either “d” or “l” isomers. It is important for drug testing facilities to test for both of these isomers, to prevent a positive test that is in fact negative. When using a Vick’s Vapor Inhaler, the test will show 100% positive for “l” isomer.
If you truly did not use Meth, and only the Vick’s Vapor Inhaler, the test should conclude that you have less than 20% of the “d” isomer. Since Meth is made of both isomers, they installed these percentages as wiggle room, for those who have not taken the drug to prove their point. Now, most facilities strongly recommend that you use a medical review officer for all questionable, positive tests.
