Toxicology Testing

Toxicology Testing

A toxicology test checks blood, urine, or saliva for the presence of drugs or chemicals. In rare cases, stomach contents or sweat may also be checked.
Drugs can be accidentally or deliberately swallowed, inhaled, injected, or absorbed through a skin surface or mucous membrane.

In the test also includes drugs like prescription medicines, non prescription medicine: aspirin or acetaminophen, vitamins, nutritional supplements, alcohol, and illegal drugs, such as cocaine and heroin.

A toxicology test may check for one specific drug or for up to 30 different drugs at once. Testing is often done on a urine or saliva sample instead of blood, because urine and saliva tests are usually easier to do than blood tests.

Traces of a drug may remain in urine longer than in blood. Urine tests often can detect drug use within the last 5 days. Saliva testing can detect drugs used within the past day.

Why It Is Done
A toxicology test ("tox screen") can be done to:

Help find the cause of life-threatening symptoms, unconsciousness, or bizarre behavior in an emergency situation. It is usually done within 96 hours (4 days) after a drug may have been taken. The toxicology test is used to find out if symptoms may be caused by a drug overdose. Both a urine sample and a blood sample may be tested.
Test for drug use in the workplace, especially for people who are involved with public safety, such as bus drivers or child care workers. A toxicology test may also be a normal part of the application procedure for some jobs. This may be done on either a blood or urine sample.
Test for drug use among middle school and high school students involved in competitive extracurricular activities. Such activities include athletics, cheerleading, choir, band, and foreign language clubs.
  Ashkenazi Jewish ancestry and a personal or family history of an HBOC-associated cancer*
Test athletes for the use of drugs that enhance their athletic ability. This is usually done on a urine or saliva sample.
Evaluate the possible use of date rape drugs. This is usually done on a urine sample.
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