Good questions. I think if someone is currently using ADs and such they are in treatment and either symptom free or still working it out. If the drugs got them through the problem and they don't need them anymore, they are cured and do not have a mental illness.
We could make a question with these answers:
1. In treatment with no symptoms and a clinical diagnosis
2. In treatment with symptoms and a clinical diagnosis
3. Was treated, now have no symptoms
4. No diagnosis, just self improvement
5. I'm treating subclinical symptoms with success
6. I'm treating subclinical symptoms w/o success
7. I've recovered and am no longer treating/being treated for clinical symptoms
8. I've recovered and am no longer treating/being treated for subclinical symptoms
9. I'm treating a condition caused by drug abuse
Can you think of anything else to add?
I look forward to your findings.