Methods of Alcohol and Drug Testing
1) Hair Test: (Hair follicle drug test)
Uses 1 1/2 inch of hair. Detects drug use for up to 90 days and is therefore good for detecting a history of drug use. Hair drug testing does not detect drug use until within 7 to 10 days of use. To test positive, drugs must be used at least three times in that window. Drugs ingested are circulated into the blood. The blood nourishes the hair follicle and allows it to grow. As it grows, the newly grown hair will have traces of the drugs trapped within the core of the strand. Dyes, bleach or shampoo do not affect the results of the hair drug test. Limited exposure to smoke in a room also does not affect the results of the hair drug test.
2) Breath alcohol Test:
DOT approved equipment used.
3) Urinalysis: (Urine Drug Test)
Detects traces of a drugs in the urine. Traces of drugs can be found within a short time after using them. Depending on the drug, traces can remain for days or weeks. There are two methods:
- Rapid Screen drug test- provides instant results which are FDA approved but not DOT approved. An Independent study found this test 100% accurate. However, positive results should be confirmed by certified SAMHSA lab. This test is good for drug screening of employees.
- 100% accuracy drug test done by a Federally certified SAMHSA lab with specific chain of custody procedures followed. This method of drug testing is DOT approved. Results are received in 48 to 72 hours.