A recent experience:
I went to a DBT meeting and I had full control of the body because nobody else wanted to deal with the group. I said our piece about not coming back and sat through the entire meeting. Everyone there was BPD, and I wasn't, and I couldn't relate to the group. While sitting there, I kept fighting falling into a dissociative trance and also was experiencing DR. I don't remember anything from that meeting, just that everyone and everything was not real.

I have these experiences quite often that I just ride them out. I found that freaking out only spikes anxiety, so I just remain calm and watch and wait, trying to stay grounded knowing that it'll go away. I imagine this would be the getting older part, experience.

Sometimes the DR is triggered it seems when I experience sensory overload, like walking into a store with all the colors and shapes, bright lights, and people. Sometimes it just happens. What I see or hear isn't real, just different. It's like I entered another dimension and seeing everything I know for the first time, but not believing.

Sure I take meds, but I've had these experiences long before I started my regimen. My meds are pretty side effect free.