Indicas are often preferred for medical use. That couch-lock body high is better for pain relief. I picked up a 1/2 oz of something called manatuska citrus, from a med mj supplier, a while back that had a pretty high percentage of indica. I wanted it because I was having a back spasm that was really painful and I couldn't even turn my head. It did wonders for the back pain but I still have most of it 'cause its just too heavy. Its so potent that a few hits will do you in and you'll be absolutely useless for the next 4-5 hrs. It's great for a before-bed smoke though.