Hi, I Would Like To Know How Blood Drug Testing

Posted on Sat, 4 Jan 2020

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

Sat, 4 Jan 2020 Answered on

Last reviewed on

Question : Hi, I would like to know how blood drug testing for thc works. What is it that is being tested? What is seen on the results? How long does thc remain in blood after last use?

Answered by Dr. Dr. Soujanya (-4 hours later)

Brief Answer:
It is being tested for tetra hydro cannabinol.

Detailed Answer:
Hi,
Welcome to 'Ask A Doctor' service,

I have gone through your query in detail and can certainly understand your concern.

Tetrahydrocannabinol which is an active form of cannabis can be tested for a maximum of 3 days after the last consumption.

If there is a history of chronic use, there will be a possibility of positive to a maximum of 7 days, which is indirect evidence of cannabis consumption.

Hope this information would help you.
Thank you.

Above answer was peer-reviewed by : Dr. Arnab Banerjee

Follow up: Dr. Dr. Soujanya (6 hours later)

Thankyou I appreciate it. And what exactly shows up on the blood thc test results? for example what does that paper look like

Follow up: Dr. Dr. Soujanya (3 minutes later)

Do vape oils (thc oils) last longer in your blood than the actual plant?
If a pee test comes back clean, does that mean your blood is clean as well?

Answered by Dr. Dr. Soujanya (30 hours later)

Brief Answer:
Tetrahydrocannabinol can be detected in the test.

Detailed Answer:
Hi,
Welcome back,

I have gone through your follow up query and can certainly understand your concern.

I'm not aware about vape oils duration.
You may need to consult deaddiction super speciality in order to get all the details about cannabis addiction.

Thank you.

Above answer was peer-reviewed by : Dr. Vaishalee Punj