If the individual can't be further trusted with the duties and responsibilities of citizenship, to include firearms use and voting, then it would seem unreasonable to set them loose at all.
If a person has been judged mentally incompetent to stand trial, or if they have mental retardation or seriously diminished mental capacity, then do they have the right to own a firearm?
Note that the new diagnostic manual for psychiatry, generally known as the DSM-V, will be coming out in a few months. And from what I've seen of it, many of the included *syndromes* and *mental conditions* are about to be utilized to deny civil rights to a very large percentage of the citizenry.
Oh, BTW: you forgot to include the one American in Ten who's currently on prescribed anti-depression or anti-psychotic medications. Shouldn;t they be included too? And all those poor veterans suffering from the terrible mental anguish of their service? Surely you wouldn't want to trust them with weapons....
Do you want my state to tell you and your state who you should decide deserves to be allowed to own a firearm? If not then why should I want your state to do the same to mine?
Does it include medication for endocrine disorders?