"Oil is more potent then bud". You got that right. And has a significant affect on pain, that I can state from personal experience.
The oil last longer and is far more pleasant then narcotics also. No nausea, no breathing issues, no irritability or dizzy sensation.
In one week of using oils, I've been able to decrease narcotic analgesics by 25% and counting.
I don't believe using cannabis can completely eliminate the need for narcotics, at least in pain management, but I may be wrong. I also certainly can't speak for those people with other conditions.