I have a drug test coming up for pre-employment. The test is done at concentra. I would prefer to sub out of any other option. I bought "Ultra pure pre-mixed synthetic urine" made by ultra klean?

It is only the 2 oz version, and I heard that the minimum needed in the cup is 2 oz. Will they notice that there's no urine in the toilet? At Concentra they prevent you from flushing, and they have a blue liquid in the toilet bowl. I feel like it is dangerous to use my dirty (real) urine to fill the toilet bowl since they could probably test that.

I guess my main concern is them figuring out it is synthetic since I will have only 2 oz in the cup, and nothing in the toilet bowl.
bigigantic Reviewed by bigigantic on . Subbing with drug test at concentra I have a drug test coming up for pre-employment. The test is done at concentra. I would prefer to sub out of any other option. I bought "Ultra pure pre-mixed synthetic urine" made by ultra klean? It is only the 2 oz version, and I heard that the minimum needed in the cup is 2 oz. Will they notice that there's no urine in the toilet? At Concentra they prevent you from flushing, and they have a blue liquid in the toilet bowl. I feel like it is dangerous to use my dirty (real) urine to fill the Rating: 5