Can you pass a drug test if you used someone else's urine but still had to add some of yours! Stopped using 1 1/2 days before test, menth?

If you have drugs in your system and you add your own urine to someone else's then no, you will not pass a drug test. It's going to test the whole batch. It might dilute the test somewhat, and the traces might be faint, but it will still show up if you put more than a couple of drops of your dirty urine in the cup.

I don't think so nurses are pretty smart.