i dont think thyroid has to do anything wid da drug.
.....secondly thyroxine values do not change in days.dats why ppl having thyroid prblms hav tests after about 6 months.
DIS INFORMATION IS NOT BASED ON PRACTISE.
From what I googled there are many factors involved as to how long it stays in the body and it causes the body to produce some chemical that is a tell tale sign. So as has been said, go to the dr. The tests have improved over the years. It is worth the cost of an office visit.
I would ask a doctor also, as we are only able to offer support and are not medical practioners. You might also check the substance abuse forum here, I am sure you will find more solid answers there. Good luck.
You asked about a thyroid test detecting illegal drugs I considered it would require an experts answer, RR has given you information that is good.. I still say inspite of the above post it requires an expert to tell you about the test for illegal drugs...
Your comment and suggestion will help the sufferer. This is the right support we need in a forum.
According to Wikipedia (you might want to research it elsewhere) cocaine can be detected in a blood sample only up to 24 hours after use.
http://en.wikipedia.org/wiki/Drug_test
It is possible you should put this question to the expert Doctor Forum