Trait controlled by the both environment and genetic factor. Usually, multifactorial traits outside of illness result in what we see as continuous characteristics in organisms, especially human organisms such as: height, skin color, and body mass.
I recently took a drug test for a job. I tested positive for opiates in my urine. I do not and have never taken drugs of any sort other than alcohol. I dont take any prescription drugs, how is it possible that this happened. I hade consumed some beer about12 hours before the test.
This means that if you took a high enough dose recently enough, you can fail a standard drug test for opiates. That said, people on low to moderate doses shouldn't fail in most cases. Even if you're on a low dose, however, there are cheap urine tests to detect oxycodone at a 100 ng/mL cutoff.