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How Long Does Cocaine Stay In The System?

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Posted on Mon, 29 Dec 2014
Question: Approximately .25g of cocaine ingested on a Wednesday night. When are metabolites reduced to pass a screening of urine?
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Answered by Dr. Muhammed Aslam (46 minutes later)
Brief Answer:
It could take upto 8 days.

Detailed Answer:
Hello dear, welcome to HCM forum.

A drug takes about 4-5 half lives for complete clearance from our body.

Cocaine has a short half life of 1 hour, and so the drug itself is cleared from our body in less than 6 hours.

But, some metabolites of cocaine (like Benzoylecgonine) have a very long half life and can be detected in urine up to 8 days after its use.

Most of the screening tests will test for such metabolites too. So it will take more than 8 days to clear the test.

Hope I have answered your query.
If you have further questions, I will be happy to help.
Thank you.
Above answer was peer-reviewed by : Dr. Vinay Bhardwaj
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Follow up: Dr. Muhammed Aslam (4 hours later)
I've been researching this topic and find that one time use can be reduced to an acceptable level with in 3-5 days ng/150 which would pass a 9 panel screening.

What are your thoughts? I have almost zero body fat.
doctor
Answered by Dr. Muhammed Aslam (6 hours later)
Brief Answer:
Depends on frequency and duration of usage.

Detailed Answer:
Hi dear,
Sorry for delay.

That depends on whether you have taken just a single dose, or was taking it for longtime.

After single dose, metabolites remain detectable in urine for 2-4 days while in chronic users it remain detectable for up to 8-10 days after last dose.

Hope you got it cleared.
Thank you.
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Above answer was peer-reviewed by : Dr. Yogesh D
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Answered by
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Dr. Muhammed Aslam

General & Family Physician

Practicing since :2010

Answered : 987 Questions

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How Long Does Cocaine Stay In The System?

Brief Answer: It could take upto 8 days. Detailed Answer: Hello dear, welcome to HCM forum. A drug takes about 4-5 half lives for complete clearance from our body. Cocaine has a short half life of 1 hour, and so the drug itself is cleared from our body in less than 6 hours. But, some metabolites of cocaine (like Benzoylecgonine) have a very long half life and can be detected in urine up to 8 days after its use. Most of the screening tests will test for such metabolites too. So it will take more than 8 days to clear the test. Hope I have answered your query. If you have further questions, I will be happy to help. Thank you.