does ativan / lorazepam lower blood pressure at 1 mg tab? I am starting new bp meds that haven't kicked in yet. I was weaning off ativan but felt pressure was a bit high so I took a whole 1 mg for the first time in a week. I was down to 1 1/2 for the whole day. The ER gave me 2 mg to lower my blood pressure and it worked but I don't want to take 2. Will 1 reduce it some?