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  • October 28th, 2010

    Medical Information On Hair Drug Testing

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    Read the medical information on hair drug testing.

    Drug testing tests the most commonly abused five drugs namely amphetamines, PCP, cocaine, opiates and Cannabinoids under the guidelines and policies of SAMHSA. It has become mandatory in many companies, schools and for federal employees since 1980. Drugs can prove to be vey hazardous for the human body. There are many negative effects of excessive drugs on nervous system. It is necessary to incorporate no drug policies and drug testing all over the world.

    In United States of America hair drug testing is increasingly used by the employers to test their employees for illegal use of drugs. Hair follicle testing is a popular and reliable option for drug testing as it can detect the drug usage dating several months prior to the test. The sample of 50-60 strands of hair is cut from the scalp and weighed. The sample is then further cut into small pieces and sent to the lab for testing. The drug is detected in liquid form in the hair by the use of ELISA technique. If you test positive, then you are asked to donate another sample for confirmation testing. Hair on the body can substitute the hair sample in absence of hair on the head.

    When marijuana or any other drug metabolites are present in the system, they are carried away by the blood through the blood vessels to the head. They then get filtered through the hair. They remain in the hair for several months. Longer hair can detect drugs used dating even further ago. Hair drug testing is a bit more expensive than urine drug testing but still is preferred because of its effectiveness in drug detection.

    Hair grows at the rate of Ѕ inch per month. It is thus complicated to pass a hair drug test. Masking hair is effective for only a few hours and some companies which claim that their products can clean the hair virtually forever are totally false. A person’s skin consists of adipose tissues. This is the place where drugs metabolites and toxins are stored. Logically when the body sweats or gives out skin oil these toxins will enter the hair strand. Thus masking is not going to help. Moreover the use of combs and towels which are not thoroughly cleaned can contaminate the masked hair. Same goes for hair sprays and gels. Thus it is very difficult to pass a hair follicle test.

    However reports suggested by a hair drug test cannot be alone used as the evidence for drug use as they have got no forensic standards.

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