i hope you can write this down in a journal or something so you can remind him of how good he can feel. When circumstances force a change from this good period, if you have a tape recording or a letter where he expresses how good eh feels, and how much the medicine is helping then maybe he will be more willing to make medication tweaks.
It was just a thought. I am truly happy for you now. It is awesome when you make a tough decision and it turns out to be totally for right their problem!