Is there an over the counter drug test?

no, lab test are more in depth. ** There are two kinds of urines tests, one called an EMIT test, which is like the pregnancy test (which you can buy to test yourself at home) and there is a GC/MS test which is only preformed at a lab. Si it is possible that they do an EMIT test, which would have the same results as if you did an at home test, but like the person who commented before, if it is a lab test, the cut-off is usually alot lower. EX: THC Emit Test = 50ng GC/MS test = 15ng Hope this helps!