You can block it and measure consumption. This is easy.
> 2. antidepressant
Originally stims weren't suppose to be used if someone is depressed. But now heaps of people are on both. If you are spiking dopamine you are bound to have a crash and the symptoms of it. There is a lot of reports of this. This crash can feel like depression. So its like a cycle of one drug covering for another.
> 4. Would you tell someone...
What is the _organ transplant event_ analagous to in an ADHD scenario? Does not fit.