i was on ativan for the past 12 days that i got from er. i take it with my toprol xl 25 mg. the ativan was 0.5. when i went to my reg doc i was almoat out of ativan so he gives me this sample pack of lexapro 10mg. and says to take that when i run out of ativan. will the lexapro cause any interractions if im taking torpol? also how long do i wait after taking that last ativan - i took the last one about 11 last night. which is better - ativan or lexapro for anxiety - to calm down?