Benzo & Opioid Cross Tolerance?

[xboxer7]

I've gotten hold of a few Klonopin's for the first time and have read somewhere (forgot where) that they increase opioid tolerance. How true is this? I also have a (albeit very slight) tolerance for xanax, the only benzo I've been using so far so I also want to ask if other benzo's besides k-pins increases opioid tolerance (if its true). thanks.