Yes diazepam is a big deal. Do your home work. This topic is so black in it's wrong thought process that : People do not realize how it can become very addictive and tolerance level
I do not know how serious you are about this group of meds, Benzodiazepines, but within two weeks if on a medium dose There can be issues
Anyway good luck
Also to answer your original question - Yes Valium is a big deal. Do your research and talk to your pdoc and/or health care pros If you have any?
Here's a toss off link . Look into pubmed and a lot of anecdotal stories They often will show you .
List of Benzodiazepines: Types, Side Effects, Addiction & Withdrawal