Question: can diazepam make you fail a drug test?
Answer: Diazepam (Valium), for example, can be found for weeks after the last dose. Although most benzodiazepines show up in standard urine tests, some don't. Alprazolam (Xanax), clonazepam (Klonopin), temazepam (Restoril), and triazolam (Halcion) may not be found in many of the common tests.