Answer:
It can be as quick as3-4 days, depending on the speed of one's metabolic rate. They are not typically tested for in a standard urine screening, but it depends on the situation.
Could take 2-3 weeks...all depends on the person, way it was taken and how much was ingested. If given at a hospital or facility through an IV, you can expect it to stay in the system for at least 2-3 weeks.