I thought I had mild or beginnings of cotards syndrome and solipsism syndrome from being in outer space too long like on Mars and the moon. Don’t know or could care less. Getting better.
Solipsism shouldn’t matter unless it’s pathological and causes psychological distress then it should be treated with therapy and perhaps medication. Unfortunately, APs can and sometimes increase DP/DR and increase dissociation which increases solipsism and it never really heals until you get the anxiety under control, accept the way things are philosophically, and move on, and stop ruminating, etc.