Kid stuff symptoms and conditions

My husband is suffering from a back injury, He has been prescribed, Soma, Zanaflex and Meprozine. Since being on these meds his moods have changed. He has become irritable, depressed, short tempered and very argumentative. He is not the man I married while he is on these meds and when he doesn't take them he is ok for a while but then is like some one on drugs who needs their next fix. I am very concerned for my husband and my family because he has started taking yelling at my daughter for stupid kid stuff and arguing and yelling at me about small stupid things like whether a valve was open under the kitchen sink. He has had a migraine for 3 weeks now... his appetite has decreased... he has been having weird dreams and twitching in his sleep.. He has also experienced dizziness, insomnia, restlessness and irritability. There are other side effects... I do not recommend these medications at all especially together....

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.

My son is almost 6 yrs old. He has been taking Singular for approx 3 years, in addition to Claritin and Nasonex. This is all for his allergy to mold. His doctor started him on these meds after a 6 month episode with sinus infections leading to asthma-like symptoms. We have not noticed anything unusual about his behavior until approx 3 months ago. He started waking up every night (2-3 hours after going to bed) with bad dreams. At first he would not fully awaken and fall back asleep immediately. After a month or so of this happening most nights, he had two nights in a row where he woke up screaming and was inconsolable for about 30 minutes. We initially thought it was night terrors, but he was not scared or fearful, he was just upset/angry. He would hit the bed repeatedly and yell. He didn't know what he was upset about but would talk about how he thought we hated him, he was dumb, etc. After about 30 min he would 'snap out of it' and return to his normal self and go back to sleep easily.
At first we thought these were night terror brought on by a recent fever, but he had another episode last night. He has also been falling apart at the littlest things and getting quite violent (for a 6 yr old). He was sent to his room yesterday evening because he was complaining about the dinner his mom made (lots of complaining these days..). He had a total melt down an started throwing things and hitting the door so hard he put a hole in it.
Some of this behavior I would chalk up to normal kid stuff, new baby brother, etc. But I am suspicious about the negative thoughts, bad dreams, and instant melt downs... I stopped giving him Singular today and we will see what happens. God bless you all as we figure these things out...