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Does cannabis show up on a full blood count?

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General & Family Physician
Practicing since : 2010
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Does cannabis show up on a full blood count?
Posted Sun, 18 Nov 2012 in Blood Disorders
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
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