urine?
could it be urine?
because:
First, cocaine itself is metabolized too rapidly to be measured for routine screening. When urine is being screened for the presence of cocaine, it is actually benzoylecgonine, a metabolite of cocaine, that is being measured.
Second, as to how long it will take for this metabolite to be eliminated from the urine, in some cases the answer may be longer than traditionally thought. Several studies suggest that benzoylecgonine can be detected in the urine of chronic, highdose abusers for longer periods of time than originally expected. First void of the day samples will yield the highest concentrations of drug metabolites.
Due to these variations in urine concentration, positive test results can occur following a negative test result, although no additional cocaine was used. Many people try to avoid a positive test result by "watering up," or drinking large amounts of fluids to dilute their urine. Ideally, a 24-hour sample should be taken, but this is impossible in most work settings. Performing random urine sampling is about the only way to assure a representative specimen.
The widely accepted time period for benzoylecgonine to be cleared from the urine is three to five days. One study suggests that high dose users (i.e., 0.5 gram or greater for each episode of use) can test positive after eight days. Another study claims that benzoylecgonine can be detected in heavy cocaine users for 10-14 days. The longest time over which positive urine levels of benzoylecgonine were detected was 10-22 days.
could it be urine?
because:
First, cocaine itself is metabolized too rapidly to be measured for routine screening. When urine is being screened for the presence of cocaine, it is actually benzoylecgonine, a metabolite of cocaine, that is being measured.
Second, as to how long it will take for this metabolite to be eliminated from the urine, in some cases the answer may be longer than traditionally thought. Several studies suggest that benzoylecgonine can be detected in the urine of chronic, highdose abusers for longer periods of time than originally expected. First void of the day samples will yield the highest concentrations of drug metabolites.
Due to these variations in urine concentration, positive test results can occur following a negative test result, although no additional cocaine was used. Many people try to avoid a positive test result by "watering up," or drinking large amounts of fluids to dilute their urine. Ideally, a 24-hour sample should be taken, but this is impossible in most work settings. Performing random urine sampling is about the only way to assure a representative specimen.
The widely accepted time period for benzoylecgonine to be cleared from the urine is three to five days. One study suggests that high dose users (i.e., 0.5 gram or greater for each episode of use) can test positive after eight days. Another study claims that benzoylecgonine can be detected in heavy cocaine users for 10-14 days. The longest time over which positive urine levels of benzoylecgonine were detected was 10-22 days.
