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Family Physician
Family Physician, Board Certified MRO
Category: Drug Testing
Satisfied Customers: 12816
Experience:  Medical Review Officer - Physician Trained and certified in drug test interpretation
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How long does cannabis/marijuana stay in your system please

Customer Question

How long does cannabis/marijuana stay in your system please ? Both Urine and Blood ?
Thank you
Submitted: 3 years ago.
Category: Drug Testing
Expert:  Family Physician replied 3 years ago.
The detection period for blood is fairly short - a few days.

Urine testing depends on the frequency of use. Following a single or isolated use - 3-4 days is expected. With daily use 10-15 days is expected. The commonly reported "30 days or more" that you will find on various websites (often those trying to sell things to "beat" drug tests) is really VERY uncommon and only seen in VERY VERY heavy daily use.