Meprozine and soma

My husband has been prescribed Meprozine for a back injury, and since he has been on it I have notice a major difference in his moods, he is edgy, and temperamental. He has started yelling at my daughter for stupid kid stuff and arguing with me over small things and we never argue. He has had weird dreams and twitches in his sleep. When he is on the medication he doesn't seem like the man I married and when he is off its like hes going through withdrawals and trying to go un-noticed. He is also on Soma and Zanaflex. I don't know what to do. Im worried for him. He is also becoming depressed, and has had a severe migraine for 3 weeks now. He wont listen to me when I tell him not to take it. I would not recommend this medication to anyone, especially if they want to keep their relationship.