Norco is my life saver also. I think it might be because you are angry already. Some things intensify the mood you already have. Norco are not real powerful, and dont take all the pain away, but at least takes the edge off so you can at least do some things you enjoy. I know you wont be able to be like you were before RSD, but you can do more than you could without pain meds, or more because the pain meds you are taking make you stupid all the time.
I hate that medicated fog, so I try to find a balance of meds and mind.