Yeah, Valium [diazepam] is one of the stronger benzos, I believe. There's a reason Lydia's mother was 'sleeping with Prince Valium' in Beetlejuice. I keep Xanax [alprazolam] on hand for my anxiety disorder. I should think that just about any benzo would increase the effect of a narcotic analgesic. Or it could be just to knock you out so you just don't give a sh*t. In which case, yes, please, many. *holds up empty quart-size mason jar* Fill 'er up!