Anywhere from 12-72 hours depending on amount, how long you have been taking them, your metabolism and if you have been drinking water or not.
Anywhere from 3-5 days usually. The more you drink and piss the earlier it will be out of your system.
I have been taking them regularly a long long time. I passed a urine test on Friday. It had been 72 hours and a lot of water. I took one the day before and failed it.