In some cases, a toxicology screen might be performed using a saliva or hair sample. The contents of the stomach can also be screened for drugs when doctors suspect someone has taken a drug orally. Many substances can be discovered through toxicology screens.
Common classes of drugs that may be detected by toxicology screens include:. Depending on the drug, it may show up in the blood or urine within a few hours or weeks after being ingested. Certain substances, such as alcohol, are eliminated from the body fairly quickly. Other drugs, however, can be detected for several weeks after being used. One example is THC, which is in marijuana. Most toxicology screens provide limited information about how much or how often someone has taken a drug.
The results of a toxicology screen are usually positive or negative. A positive test result means that a drug or multiple drugs are present in the body. Once your doctor identifies the presence of a drug by screening, a more specific test may be done that can show exactly how much of the drug is present. A team at Newcastle University in the UK has developed a new testing technique that uses human tissue to measure drug reactions.
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Lemos pointed out that "even if you don't have a backlog, sometimes you have people calling in sick, you have an instrument malfunction, any number of factors" that can lead to a delay. Skip to content Site Navigation The Atlantic.
Popular Latest. The Atlantic Crossword. Sign In Subscribe. This article is from the archive of our partner. When a story like Whitney Houston's death breaks, there's always a huge rush to get information. Philadelphia, PA: Elsevier; chap Medical toxicology. Conn's Current Therapy Philadelphia, PA: Elsevier; ; Toxicology and therapeutic drug monitoring. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition.
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Any duplication or distribution of the information contained herein is strictly prohibited. Information developed by A. Please discuss with your doctor any questions or concerns you may have. Medical Tests. Definition A toxicology screen refers to various tests that determine the type and approximate amount of legal and illegal drugs a person has taken.
Alternative Names Barbiturates - screen; Benzodiazepines - screen; Amphetamines - screen; Analgesics - screen; Antidepressants - screen; Narcotics - screen; Phenothiazines - screen; Drug abuse screen; Blood alcohol test How the Test is Performed Toxicology screening is most often done using a blood or urine sample.
How to Prepare for the Test No special preparation is needed. How the Test will Feel Blood test: When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation.
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