Do they drug test when you renew you medical card for your CDL. I was told to drink allot of water because they would be doing a sugar test. is this all they will be testing for or will they find the thc too. I am getting my medical done tomorrow at a chiropractors office. I am pretty sure they dont test for drugs just sugar but I wanted to know if any of you knew for sure. My union is normally the ones that call me for the random drug tests.
