Soveh,
I'm not well versed in the medication area... what works with what - but hang in there, both of you - be sure to tell the doctors everything so that they can more accurately put the pieces of the puzzle together to help your husband out. Even if you may think it's a teensy detail, it can be enough to give them a clue as to what to do. The doc's aren't gods, but they'll do their best with what they know.
Many, many hugs to you both,
Einna