I understand these "seizures" that you are talking about. My very first panic attack about 5 years ago, was an "out of the blue" panic attack, and I worked myself up so much that I started shaking so bad my mom had to literally hold me down. I was totally conscious and never did I pass out but I was shaking uncontrollably for about 30 mins. This has maybe happened a couple times since, but is the extreme cases for my panic. Panic can present itself in so many different ways. As for your daughter taking 13 ativan weather it leaves her system or not, being in a health care profession I can tell you that taking 13 at any strength 0.5 -4 mg (is prescribed for people with anxiety) could kill a person in overdose. And if I doesn't seriously harm the person, taking so much could actually have reverse effects, like convulsions, hallucinations, memory loss, and trouble breathing. I suggest that she see her doctor to find another drug that will relax her during these attacks, if she is in the clear for any other medical condition then the chance that it is panic is most likely. I know that the shaking is a symptom of panic and many other people have experienced it as well. I hope this has helped. And on a side note, I was terrified to take a medication to control my anxiety, I refused it for years, until I was in post secondary education and I was in a very competitive program and I had to give it 110%, and I realized that I just couldn't control all the panic without a little help. I eventually was able to get things under control again without medication. Your daughter may also be scared and maybe she never did take the pills. Its sometimes scary when panic has such control of your body and you cant do anything at the time to stop it.