Wow that sucks... I don't have that book with me at the moment now, but she does also talk about the fact that sometimes anxiety can be masked, and in her case she talks about DPDR masking the anxiety. I have zero knowledge about how anti-depressants should work both on anxiety or DPDR, or if it can be said that anti-depressants can mask or solve anxiety problems. So I am in no place to make any conclusion. When I did take Zoloft it did make my DPDR go away completely quite quickly, and the feedback from my then psychiatrist was that "this makes sense because DPDR is usually caused by anxiety and anti-depressants reduce anxiety". So she did not mention masking in this case, but she also did not explain why Zoloft gave me hallucinations, or why I had withdrawal after only 4 days of treatment. But people are so different. Then I tried other anti-depressants which gave me no effect.
In my case I see that my DPDR stays the same whatever my anxiety level. I have had times where I was happy, functionning at work without anxiety or procrastination, just focusing on my stuff, and ten years ago I have had times with anxiety so strong that my then girlfriend could count my heartbeats through the mattress, and my digestion and immune system had shut down and I was shaking all the time, now this year I have felt quite serene compared to that. But still, except for some recent developments my DPDR was the same throughout all this period, for those ten years. When I felt almost like I was dying of anxiety ten years ago my DPDR wasn't even slightly stronger, just the same as always, quite close to what it is now. So for sure I have an anxious temperament and it is possible it is related to DPDR, but so far treating my anxiety did not help me. What is helping me so far is to put myself at the center of my life and my life choices in some way. Minding too much about what other people think, letting their look on me decide for me (kind of), or not respecting my own "boundaries" means for me that I am not inhabitting my life, on some kind of gut level, not just theoretically. In my case perhaps this state of mind alone could eventually have caused me to feel detached from reality, but this state of mind can also easily cause anxiety because it's very anxiety triggering to live according to other people's look on you. However dealing with my anxiety doesn't necessarily mean that I changed this state of mind. But that's very hypothetical, and it's not as easy as just saying it.