... or be zonked out. I took another 2 mg. of lorazepam 20 minutes before MRI and still little or nothing. I was talking and walking the whole way home, didn't sleep until that afternoon. I'm sort of amazed after readlng these boards. I think I may just go back to Valium for MRIs. I weight 280 lbs, and have had four MRIs on my brain and back. Scared me each time. Never take a benzi for normal anxiety