Zanaflex and insomnia

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....

While taking daily dosage of 18mg increasing to 20mg after 4 days (regular increase of 2mg) I experienced a sudden blackout lasting approx. 5 minutes. I am 58 years of age and had never passed out before. The reason was bradycardia and a drop in BP, from a norm of around 125/85 to 95/58. BP and pulse rate normalised in four days but dosage not increased since. No benefit yet found in dosage of 20mg. Slight nausea and insomnia also experienced. Wondering if I should continue; following advice of GP but would really prefer a homeoepathic remedy if there were one available!
Sincerely,
Rita Hudd