If you are taking the test at the doctor's office I m wondeing if it will be a version of the at hometest? I wonder if this doc would have the more sophisiticated equipment at his office such as being able to perform a gc/mc confirmation. He probably sends your sample out.

Some jobs do state that you have 24-72 hours to be tested but I am starting a job and was informed I would be tested but was told as long as I took the UA before my official start date that would be fine. I had 25 days between offer and UA.

What type of position are you applying for?

Also everyone is different you may clean out metabolites at a higher rate or slower rate. Grab some home test through the internet or your local pharmacy to know where you stand.