That may not be a very effective medication combination for his condition, but it is absolutly a safe mixture.
Not trying to play doctor, but I would have substituted the Depakote for Lithobid.
I'm also not so sure how much good that Welbutrin is going to do him. Welbutrin is a Dopamine Reuptake Inhibitor and can be very stimulating for some people. An odd choice for a patient suffering from Depression with Mania.
That combination may not help him, but it won't hurt him either.
As for pill addiction...... None of those drugs are addictive. One couldn't get high from them even in high dosages.
Thank you soooo much for your reply. I feel better now. With all the pill mania going around it bothered me alot. Thank you :)