While the number of employers across the country which conduct drug testing on employees has increased, a new study has shown that fewer people are actually testing positive for drug use. While this trend may signal a growing reluctance by the workforce to engage in risky drug activity, the numbers may also tell a different story. Because we know that casual drug usage over the last 20-30 years has actually increased, in all likelihood, the reduction in positive tests is due in large part to cheating. The commonly administered urine-analysis, or urinalysis, test can only detect a single instance of drug use dating back 1 to 3 days, which makes it vulnerable to employees who simply abstain for a few days before each test occurs.

Fortunately for vigilant employers, there is a new drug testing option available which is far more powerful than simple urinalysis testing. The hair follicle drug test eliminates the problem of drug-users altering their habits to evade detection, because hair follicle drug testing can establish drug usage patterns over a period of up to 90 days. In order to truly pass a hair follicle drug test, a current or prospective employee’s only option is to quit using drugs entirely. To ensure that your office or workplace is 100% completely drug-free, the most effective and efficient drug testing option is the hair follicle drug test.

Source: http://www.nytimes.com/2009/12/13/business/13count.html