In my opinion, addiction is addiction.
If you are smoking pot, then you are not in recovery. This is just my belief. If someone is taking pain medication, under drs supervision, that's different, but if you are smoking pot to take the edge off, then that's not recovery.
Also, I think that anything that weakens one's resistance, is apt to lead one back to drinking. That could include being stressed, being sick, smoking pot and many other things.