Phenermine will probably show up on a drug screening. But depending on what your employer is doing the screening for, they might not even be testing for it. A urine test can tell you if you are pregnant, but only if that is one of the tests being run on it. Also, most times when they do drug tests they will also ask for a list of medications that you are taking. If you test positive for stimulants, but phentermine is on the list of meds you are taking that will probably not be reported to your employer. Unless you are going to be working at a clinic or hospital, your employer will send you to a clinic to perform the drug test. Because of HIPAA, your employer is not suppose to have access to your medical records, including prescription meds. So the company performing the drug screening, should not be giving your employer any information about your screening unless you test positive for an illegal substance. They aren't allowed to tell your employer what meds you are taking. You can read more about HIPAA at the government website ([url]www.hhs.gov/ocr/hipaa/)[/url].