Hi Donna,
I'm sorry to hear that Derrick is having a hard time with his sz. I have the cp and simple partial along with absence sz. My epi told me that cp sz. can be the hardest type of sz. to control. I know I've been on 13 different AED's and not a single one has stopped my sz. I found that mysoline and diamox along with taking vitamin B12 on my own has been the biggest help.
When Derrick has a cp sz. do you notice if he's smacking his lips, pulling at his clothing, having a hard time trying to speak, or possibly wandering around not realizing what he's doing? All of this happens to me except pulling at my clothes during a cp sz.
Cut Derrick back on starch foods and carbs also keep him away from nutra sweet (ex. diet soda) not to mention caffeine. Here's wishing the both of you well and May God Bless You!

Sue