Marijuana is Hard to Quantify When it Comes to Impairment
The standard test for a marijuana DUI is a urine test. In California ordinarily a person arrested for driving under the influence will be required to submit to either a breath or blood, however when drugs such as marijuana are suspected the choice is limited to blood or urine. Because most people will choose to pee in a cup over having a sharp needle stuck in their arm, the most common test seen is that of urine. Problems can come into play with marijuana urine tests.
Always ask For a Re-analysis of the Sample
It is fairly well accepted in the scientific community that marijuana metabolite (a breakdown product) is detectable in urine for an extended period of time compared to other drugs. Initially, it is important to define what is meant by marijuana metabolite. Ordinarily this term refers to a specific breakdown product of marijuana called delta-9-carboxy-tetrahydrocannabinal (otherwise known as THC). What is crucial to understand in the context of DUI prosecutions is that carboxy THC is not psychoactive and has no effect on ones physical performance or ability to drive an automobile safely. Carboxy THC is an oily substance that accumulates in a person's body fat over time after marijuana ingestion and is slowly released into the blood and excreted into the urine as a waste product. This is the primary reason why carboxy THC is detectable in the urine for extended periods of time compared to that of other drugs and their metabolites.
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