My Brother Has Been Put On Haldol. He Has Had

My brother has been put on Haldol. He has had a difficult time with this medication in the past. It makes him sluggish, dopey and affects his eyesight. He has done well on a combination of Seroquel, Clonzapam, and Loxipine. If he gets too dopey, he refuses to take anything. Can you give some input. The Haldol just seemed to make him complacent more than helping his psychosis?