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Does Cannabis Show Up On A Full Blood Count?

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Posted on Mon, 19 Nov 2012
Question: Does cannabis show up on a full blood count?
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Answered by Dr. Kulbir Singh (2 hours later)
Hello Tanyamac and thanks for posting the query
Cannabis can be detect in blood by the presence THC substance. It is present in the blood for 2-3 days but in frequent user it can be detected up to 7-10 days. Detection time depends strongly on the kind and sensitivity of the test employed; the frequency, dosage, and last time of use; the individual subject's genetic makeup, the state of one's metabolism, digestive and excretory systems.

Blood count does not give us any idea about the consumption of the cannabis. Other tests that can be helpful in detecting cannabis consumption are urine test, hair test and saliva test. They all also contain THC after the consumption of cannabis.

Hope I have answered your question. Write back if you have another query.
Best Wishes
Dr. Kulbir Singh
Note: Do you have more questions on diagnosis or treatment of blood disorders? Ask An Expert/ Specialist Now

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Kulbir Singh

General & Family Physician

Practicing since :2010

Answered : 725 Questions

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Does Cannabis Show Up On A Full Blood Count?

Hello Tanyamac and thanks for posting the query
Cannabis can be detect in blood by the presence THC substance. It is present in the blood for 2-3 days but in frequent user it can be detected up to 7-10 days. Detection time depends strongly on the kind and sensitivity of the test employed; the frequency, dosage, and last time of use; the individual subject's genetic makeup, the state of one's metabolism, digestive and excretory systems.

Blood count does not give us any idea about the consumption of the cannabis. Other tests that can be helpful in detecting cannabis consumption are urine test, hair test and saliva test. They all also contain THC after the consumption of cannabis.

Hope I have answered your question. Write back if you have another query.
Best Wishes
Dr. Kulbir Singh