Taking Water-pills Before Urine Test For Morphine And Percocet How Will It Effect The Results?

It will effect the creatine level and likely come out as a failed test.

Opiates will show up in a urine test if you have taken any, regardless if you try to mask them. It depends on how long you have taken them ie: If you have a regular prescription the urine test is done to make sure that amount is in your system. If you are taking them recreationally they will be in your system for 72-76 hrs. I run a drs. Office and have pretty good knowledge of all this stuff. If you want to ask me something else or if this is not what you were looking for, feel free.