See images of Diazepam (Valium), including the medication and its packaging. Yellow Round 5, Teva, Z , And - Diazepam 5mg Tablet. Diazepam. Find patient medical information for Valium Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. If so, then yes, this tablet contains 1mg of Alprazolam, the active ingredient in Valium. Common side effects include: nausea, drowsiness.