t easily distinguish dosages taken by the amount
in the
urine test. It just shows how many parts per million there is. The
drug is extracted so much over time dependent on the person's metabolism. So, the number you're given will depend on tons of factors such as time of last dose, person's metabolism, whether the stomach was empty, method of taking the drug (oral versus IV), and even how much of the drug was actually absorbed. Way too many factors to even begin to foster a guess.