It may help to spend a little time writing down all of the individual symptoms you can think of, especially the ones that lead to the diagnosis in the first place. That will help you assess which ones have improved, stayed the same, or worsened. As you do this, keep in mind that every child has behavior issues (that’s the reason they don’t live on their own yet), so make sure you’re keeping your expectations of the treatment in check.
To take it another step, take that itemized list, and build a chart where you track those symptoms (using some sort of scoring system of severity) on a regular basis. This will allow you to see trends of frequency and severity of symptoms. Change is hard to observe without collected data. It’s like the lobster that doesn’t notice the water getting hotter. But if they could read a thermometer . . .