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A drug test is a technical analysis of a biological specimen, for example urine, hair, blood, breath air, sweat, or oral fluid / saliva – to determine the presence or absence of specified parent drugs or their metabolites. Major applications of drug testing include detection of the presence of performance enhancing steroids in sport, employers screening for drugs prohibited by law (such as cannabis, cocaine and heroin) and police officers testing for the presence and concentration of alcohol (ethanol) in the blood commonly referred to as BAC (blood alcohol content). BAC tests are typically administered via a breathalyzer while urinalysis is used for the vast majority drug of testing in sports and the workplace.

The "12-panel urine screen" from Pinnacle BioLabs consists of 12 of the following:

Amphetamines (including Methamphetamine)
Barbiturates
Benzodiazepines
Buprenorphine
Cannabinoids (THC)
Cocaine
Methadone
Methaqualone
Opioids (Codeine, Morphine, Heroin, Oxycodone, Hydrocodone, etc.)
Phencyclidine (PCP)
Propoxyphene
Synthetic cannabinoids (K2, Spice)
Tricyclic antidepressants
Contents   [hide]
1 Detection periods
2 Types
2.1 Urine drug screen
2.2 Hair testing
2.2.1 Alcohol
2.3 Presumptive substance testing
2.4 Saliva drug screen / Oral fluid-based drug screen
2.5 Sweat drug screen
2.6 Blood
2.7 Anabolic steroids
2.8 Random drug testing
2.9 Diagnostic screening
3 Methodologies
3.1 Urine drug testing
3.2 Spray drug testing
3.3 Hair drug testing
4 Legality, ethics and politics
4.1 United Kingdom
4.2 United States
5 Refusal
5.1 Historical cases
6 See also
7 References
8 External links
Detection periods[edit]
The following chart from Pinnacle BioLabs gives approximate detection periods for each substance by test type.[1]

The detection windows depend upon multiple factors: drug class, amount and frequency of use, metabolic rate, body mass, age, overall health, and urine pH. For ease of use, the detection times of...

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