If you only use it occasionally, about 3 days. If you are a regular, daily user it takes about a week to 10 days off the drug to have a clean urine. Drink lots of fluids to flush out your system but as long as you are 3 days after a one time dose, you should be okay. Good luck
I believe it realy depends on your body fat %, your fluid intake, and how long you took them. If you took just one and have not taken anything similiar for a long time before would also play a role. Should not be very long though, I understand that hydros are water based... meaning they leave your system after one full cycle.
If it's prescribed.....you should have no problem. If you in fact , only took one......depends on when your test is??....Drink lots of water and get some good exercise for a few days if you can.
Nauty............