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Facts about Hair Drug Test

The hair drug test is the most accurate and the most reliable drug test. It also happens to be the most expensive. It is usually used only by the armed forces where it is more important to know the drug use habits of future soldiers than worry about the costs involved in drug testing.

The following are the facts about hair drug test:
The human hair is composed of three concentric layers.

Drug residues accumulate inside the middle layer – the cuticle. This is the reason why the test is so accurate – it is very difficult to tamper with drug residues collected at the base inside the hair strand. This is also the reason why the test is so expensive, for the drug residues inside the cuticle have to be examined after opening the outer layer. This requires precision, the correct equipment and material.

Because the residues are so difficult to tamper with, this test has the longest detection periods i.e. the duration for which the use of the drug can be detected after the drug was last used. The average detection period for the hair drug test is 90 days.

To cheat on this test you need to use a masking shampoo. These shampoos open the outer layer of the hair and mask the drug residues at the base of the cuticle. This prevents their detection in the test. The sealant in the shampoo is not soluble in any known solvent, so the result of the test is assured.

Vicodin is a combination drug and is used as a painkiller for chronic pain. It can also be prescribed if you have undergone a recent surgery of a major nature. One element of vicodin is an opiate derivative and is sought to be detected in vicoden drug testing. Vicodine is also used as a narcotic and is addictive. The average retention period for vicodine is 2 to 5 days depending on the use. If you are using it under prescription, then it is best to have the prescription ready with you. Show the test conductors this prescription before the test to avoid any trouble.