Blood Drug Testing

Question about Marijuana and Thyroid blood tests

smoked marijuana for the first time today (and the last too), and my question is if i would get a blood test for my thyroid (just checking up on it like they annually do), will they be able to tell i smoked marijuana? (and im not smoking anymore til then) If yes, than how long do i have to wait before i can get a thyroid blood test so the marijuana doesnt show up? (im a 16 year old female)

Public Comments

1. If what they are looking at is your T3, and T4. Then you should be fine. It takes at least 2 or 3 days until it is out of your system.
2. I don't think that your thyroid test would determine if you have smoked marijuana. It will just determine your thyroid blood levels. To make sure, just have your blood tests 48 hours after you smoked marijuana to make sure it is out of your system.