Hmm how to explain without using my hands.

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The first line is normal everyday baseline that everyone has. The second represents high anxiety. The benzo lowers the anxiety..at first. Then it goes up to where it was or higher.....so you take another pill to lower it. Eventually your baseline is higher than what you started with and the constant up and down of anxiety exacerbates the PTSD. If I did it all over again I would insist on trauma based therapy that taught specific copping skill for triggers and anxiety reduction. Then later regular therapy that explores the specific past trauma