How long does coke last in your system?!

Best Answer - Chosen by Voters

90 day in hair
7-30 days in urine

Not long enough, which is why it is a waste of time and resources. Better to take Adderall--not nearly so costly, and it is legal assuming you have a prescription (which is easily cajoled from most doctors). Better to drink, in this writer's opinion. At any rate, your friend likely has nothing to worry about. The drug tests are a psychological preventative measure. It costs nothing to extract blood, or take a urine sample, but it is costly to send the fluids to be analyzed. In most cases the urine is disposed of never having reached a laboratory. I have been a government employee and have passed numerous drug tests while high off my gourd. It's no secret--this is a most often a psych out.

Personal experience.

About three days in the blood stream, but a hair follicle test can detect it for up to 90 days.
Just to a comment, this question should be on the Science & Mathematics or Health section for you to get more appropriate answers.

There is a very good chance she will fail.
For some people, cocaine is fatal, especially if it's their first time.

Drugs take about a month to leave your system, she will fail for sure....

4 or 5 weeks.

not long enuff, that's 4 sure!

but yah ur friend is prbbly screwed lol.