I don't understand the connection at all. The pharmacy doesn't know if I'm diagnosed with ADHD but I have all those same problems. Also why would they want to withhold drugs from you? Aren't pharmacies usually parts of money-grubbing conglomerates that just want money out of you? What is in it for them to use "stigma" as a way to reduce service to you? Conversely, can you imagine the blowback if this were discovered to be the case?