Last night I used Google to find more info on ‘marijuana urine’ so I could post it into ‘marijuana growing video’. And this is one of the many results:

What over the counter drugs will show up in a drug test? Posted by admin as Medicine Questions and Answers Most to all. The stronger the drug or more you have taken the more likely it is to show up easily in a drug test. What does this test do? The First Check 12 Drug Test indicates if one or more prescription or illegal drugs are present in urine. It is currently the only over the counter test available designed to detect prescription drugs that are being abused. The test detects the presen

Not exactly what I was looking for, but still a excellent read.