Marijuana’s active ingredient is THC, which can be detected through saliva, urine, blood, and hair follicle tests. Penalties for possession vary by state, and drug testing is required for employment, probation, and rehab programs. THC can build up in the body, making it more detectable in heavy or long-term users.
Marijuana is a plant that has psychoactive effects when ingested by humans. The active ingredient in marijuana that causes these “altering” effects is delta-9-tetrahydrocannabinol, more commonly referred to as “THC”. A saliva THC test is one of the drug tests that can be used to determine whether an individual has used marijuana.
The US government classifies marijuana as a Schedule 1 substance. This means that marijuana is not considered effective for medical use and is considered dangerous. Penalties for possession of marijuana vary from state to state and depend on the amount of marijuana “on hand”. States also have different penalties for being under the influence of marijuana. Some states have legalized marijuana for medical use, although this conflicts with US federal law.
Many companies require drug screening as a condition of employment. Some companies also require random drug tests. Courts may require drug testing for those sentenced on probation or as a condition of a plea bargain sentence. Additionally, parents can use drug tests to determine if their children are using drugs. Drug rehab programs may also require drug testing to ensure their participants are clean. Users may also be screened in anticipation of having to take a drug test for work.
When a person ingests marijuana, THC from the marijuana begins to build up in fatty tissues in certain organs of the body. This means that THC can build up in the body. A person who is a heavy or long-term user may test positive for marijuana use longer than a “recreational” user who uses marijuana only occasionally because of this.
THC will only show up in a TCH saliva test for a few hours. A saliva THC test, like a blood test, is typically used to determine whether marijuana played a role in a “work schedule” incident. Unlike a blood test, a saliva THC test doesn’t hurt and isn’t particularly invasive. Also, it is much more difficult to mistake a saliva sample used for a saliva THC test than a urine sample since a saliva THC test is typically not handled by the person being tested.
The most commonly used form of drug testing is through a urine sample. This is also the least expensive drug screening method. Urine tests can detect THC three to seven days after use, although heavy marijuana users can test positive for up to 30 days.
Hair follicles are also used to test for drugs such as marijuana. THC may not be detected in the hair follicle test if the person uses marijuana occasionally. Humidity can also have an effect on hair follicle tests from heavy users, resulting in a false negative test.
Blood testing is another form of drug screening. Evidence of marijuana use lasts only a few hours in blood, unless the person being tested is a heavy user. This form of testing is often used shortly after workplace accidents to determine whether marijuana played a role.
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