Oh I'm not sure? But someone on here might know? If they are both prescribed by your doctor though they should have told you?? If it's not prescribed then I wouldn't recommend it. I know you have to be in w/d's before you start subs but I don't know if diazepam works on the same receptors? Sorry I wasn't much help. Hang in there hopefully someone can answer you.
I have been off/on diazepam/Xanax for anxiety for most of my adult life (never abused, not my DOC) and my sub doc prescribed it as part of treatment but 2mg low dose.