Does Kolnipin Show Up In The Drug Screen Test?

HI, I recently took a pre-employment drug screen for the home depot.I am currently prescribed Kolnipin by my doctor for anxiety and panic attacks.I took the test last monday 3/03/2014 and have not heard from the employer.I called the labratory that processed my test and inquired about my results.I was told by the labratory they did not have any questions about any perscriptions I was currently taking and they already forwarded the results to the home depot on Tuesday 03/04/2014.Does this mean the pre-employment drug screen results were negative?