Drug induced comas are quite common for severe brain injuries. They use them to slow the brain until vessels heal and the brain is better able to control fluid pressures. The problem with comas is it causes the brain to forget the map to nerve pathways. This is why many comatose patients need extensive rehabilitation to slowly wake up these nerve pathways. Not a good solution for a mTBI.

Quiet rest is the recommendation. A few weeks off work in a disciplined low stress environment can make a big difference. It takes discipline to not over-exert while resting quietly. I suggest something like fresh water fishing. Sitting watching a red and white bobber for hours is good quiet rest. Or cast and retrieve a lure or fly fishing. They all have a slow pace.

There are other quiet rest activities. Quiet rest is the only worthwhile treatment.

My best to you.