Will Valium make you fail drug test?

If the drug test is testing for Benzodiazepines, then you will test positive. If the test looks for SPECIFIC benzodiazepines the you will definitely test positive for diazepam (valium). You may also test positive for the metabolites (by-products) of valium: nordiazepam, oxazepam and temazepam. However, if you have a valid prescription in your name for this medication, a positive test will not be an issue.