Thank you for your question and welcome to AnxietyConnection.com.
I am not a medical professional and would not be able to give you medical advice. I do need to say, however, that it is dangerous to take medication that has not been prescribed to you.
As far as whether the medication will show up in a drug test, that would be impossible to answer. People metabolize medications at a different rate, so there is no exact answer on how long the medication will be there. That said, drug tests are very different, based on the needs of the person or company requesting the tests. Often, specific substances, such as marijuana or cocaine, are tested for and other substances are not. Without knowing what was requested, it would be impossible to say whether the medication will show up.