green crack isn't a very good pain strain. it does have a nice high though.
quoted for truth
sr how do you like the crack strain? i have green crack still veggin . how does it work 4 pain.
Yeah pretty much what poplars said..
I'm have some Blue Crack.. but honestly I haven't really gotten into it yet

I've smoked like one bowl of it..
It's pretty much a dreamy high like blue dreams, but a lot of head high thanks to the green crack.. very light body high, mostly that 'wow.. today is a perfect day' kind of high... a LOT of head high..
I'm vaporizing the grape ape right now, bag in lap..
For pain though? I'm not seriously versed in dispensaries, or strains 'for' certain things like some people are.. but blueberry is a very sedative nice high for pain relief I've found.. one of my favorites for that.. also a very pleasant flavor and aroma.. But - pretty much the indicas give you the body high..
You can ALSO harvest late for more CBN/CBD (they now think the cannabinoid that gives cannabis it's 'medical' qualities are CBN).
The more amber the trichomes, the more sedating/couch locked/ body high there will be. The more cloudy trichomes, the more heady all around heavy THC high will be present. I have heard of a guy taking a White Widow on here to like 13 weeks. The nugs were just RED [amber] man.
https://www.rollitup.org/harvesting-curing/210501-zeuss-take-harvesting.html
If you want the narcotic couchlock stone, grow a rugged indica until its ripe.