Can you have permanent brain damage from taking valium for back pain for a short time. My husband was prescribed 5mg of valium 3 x a day and he took it for 4 days, then was taken off and put on flexeril because the valium was not helping his back pain and had bad mental effects (like he was drunk). He took Flexeril, only 3 doses as prescribed and became non responsive, drooling, uriniating on himself. I called 911 and he was admitted to the hospital for 3 days. He s home now, but confused, slow to think, speak and process things and drooling. They r/o stroke at the hospital.