I broke my femur a few years ago. It is one major thing to deal with. There was a time not too long ago that you would have lost your leg with that type of break. I still have a rod in my leg because I'm too afraid to get it taken out. I imagine with little ones that they heal better. It will be long road to recovery, just so you know. Trauma can cause all sorts of issues in the body. I would make sure he is drinking a lot, add juices, raisins (although not sure for his age), cut out bananas, chocolate, yogurt. Add fiber, oatmeal.I would hesitate to put him on anything else. I very much limit any sort of OTC or prescription medicines we put in our bodies. I do when we must (I totally agree with using the pain killers, just in case it sounds like I don't!), but I don't go looking for them. I would go to the health food store and see if they have suggestions. I would primarily use diet and natural means for helping him in this area.
Love on him, poor baby! I didn't see your original post. I will go to see it now, but oh, my heart aches for him and for you. Such a terrible pain. It is inexpressible how painful it is. I've given birth 6 times. This is worse, by a long shot.