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Cannabis Drug Testing

There are a number of different tests that can be administered to determine if there is a certain level of cannabis in the blood stream. The information that will be provided to you in this article has been gathered from various sources; the detection periods can vary from person to person due to the number of different variances such as weight, age, overall health, the amount and frequency of marijuana use. Cannabis Drug Testing can be determined regardless if the lab has the current ability or not.

The testing that will be discussed here are blood testing, saliva testing, hair testing and urine testing. Remember that these are not specific time periods but to be used as a guideline. There are new tests for saliva testing but the information is not available at this time. In regards to blood testing, for one who doesn’t use as often, cannabis can be detected up to about 2 to 3 days after use. For a more frequent user, marijuana can be found up to about 2 weeks after the last use. {{{o}}}

passing your drug test picFor testing involving the hair, usually the “standard” hair test is done. This particular test will need at least the most recent growth and about 1 ½ inches of that growth would be taken. The average growth time for detection in this area is about 90 days; of course if your hair is shorter than 1 ½ inches, the shorter the detection period.

The most common of the cannabis drug testing is the urine test. I will provide a bit of information about the urine testing after this following statement from toxicologist, Paul Cary, noted in The Marijuana Detection Window[Drug Court Review, Vol 5(1)] in which he discusses findings in recent research and he noted on pages 23 – 24 the following:

“Recent scientific literature indicates that it is uncommon for occasional marijuana smokers to test positive for cannabinoids in urine for longer than seven days using standard cutoff concentrations. Following smoking cessation, chronic smokers would not be expected to remain positive for longer than 21 days, even when using the 20 ng/mol cannabinoid cutoff. While longer detection times have been documented in research studies, these prolonged elimination findings represent uncommon occurrences and should not be used as exculpatory evidence in the majority of case adjudications.”

One of the five standard NIDA approved drug test is for THC. Since an average urine test can detect a single use of marijuana, depending upon the amount used and other various parameters, the cutoff level could be anywhere from 15ng/ml to 100ng/ml. The 100ng/ml is usually in regards to metabolism rates. Chronic and even for daily users, detection can be positive in a basic urine test from anywhere of 7 to 30 days (again varying upon the fact of the amount used and that everyone is different). Cannabinoids at lower levels remain in the body for more than 30 days but the further out time goes, the less likely there will be a positive result obtained by a test.

THC or tetrahydrocannabinol is absorbed by the body via inhalation or by ingestion via the gastrointestinal tract. The THC can be found in the body’s plasma, urine and feces; although the concentrations may be low and can be detected within several hours by a urine test, the THC can still be detected for a number of days after using.

According to the SAMHSA/NIDA or Substance Abuse and Mental Health Services Administration recommend the cutoff concentration for a positive result in an immunoassay test to be 50ng/ml and for GC-MS it is usually 15ng/ml.

This is not to say that you should use this information to use and “get away” with passing tests but it is to educate you for the knowledge for a safer use.

 

Image courtesy of cooldesign at FreeDigitalPhotos.net

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