Man the stories I can tell...
Well long story short I am about to enter a subutex program or sub program soon for my nasal 200mg oxymorphone habit while poppin roxie 30s (OC tolerance would prob be around 450mg+, I drained an entire hospital diluid dispenser twice in 2 hours after surgery before I felt real relief). I mean, the last time I had fent 100 patches I smoked all the gel in a day... so I know about opiate habits, addiction, recreational use, and actual use (all of my opiate were prescribed to me for legit pain - i just choose to abuse them and am now done with that phase of my life).
I've noticed weed can help a lot potenting opiates - a lot! Some Grade A bud rolling in hash or kief is such a nice boost. Lately I've been getting high on smaller amounts of opiates that I'd never think I'd feel by mixing a good amount of things, and cannabis is one of the main ingredients.
While NOT on anything else, cannabis kinda lost it's potency with me. I mean, I can smoke the best chronic and have daily smokers next to me getting blazed out and I feel nice and high, just not ripped. I'd have to smoke about a gram of the best bud around through a bong to get high... but I also have smoked weed since I was 14.
I believe in general the answer would be no... but there are going to be outliers.