Have medical questions? Ask a doctor online!
Hi.Welcome to JustAnswer. I shall try my best to assist you while you are corresponding with me.
Cocaine itself can stay in the system for about 72 hours and comes out in the urine for about 24 to 72 hours as well after a single use. That means 3 days, which gives you a very narrow chance of clearing the drug test.
The metabolite they check for in the blood or urine for cocaine is called Benzoylecgonine. It stays in the blood for around 30 days (for frequent users, lesser time for one time users)
Cocaine can stay in your hair for about 90 days. Some reports suggest it being detected in the hair for about 25 years but that is indeed for chronic frequent users.
I would say, stay clear of it next time and hope for the best this time. It will be a narrow escape if you get through the test negative.