Earlier quoted context omitted.
> my 7-year-old son just started half that dose This is horrifying.
We had/have a lot of reservations about it too, and discussed it at length with our pediatrician over months of observation. We decided what was more horrifying was hearing a 7-year-old — who has supportive family and friends, good health, no traumatic events, no major life changes going on, never worries where food/shelter is coming from — say he feels like "he shouldn't be on Earth anymore" and suddenly react with…
It sounds like you made a wise decision given your personal and family history and your son is benefiting. Kudos.