Having panic attack already took 1mg ativanof ohe hour ago can i take another 1mg?

Please call your doc: If you're having panic attacks through the medications you're on, you need to contact the physician who's prescribing your Ativan (lorazepam) so s/he knows what's happening. Hopefully you're also on a medicine to prevent these attacks. You need to learn slow, deep breathing and calming as well. Psychotherapy could help reduce these attacks over time. Stay away from caffeine, alcohol, street drugs.