My spouse had back surgery last Feb. He alrdy had an addiction prior but was in recovery. The back problem & surgery is the worst possible thing to have happened because now I believe he is once again dependant on the pills. His facial muscles are beginning to droop, he nods out, & just very heavy on the eyelids in general. His "out" is that he has pain, & he is prescribed. I know he does have pain, & I am trying not to be unsympathetic but now I am starting to worry about him behind the wheel. My question is does this type of addiction cause moodiness. He is nice as can be one minute & nasty the next.