Chris Davis just got a 25 game suspension for violation of the MLB's drug program for use of Adderall. He had a medical exemption in the past, but for whatever reason did not have one this year.
I could see if it was a PED for a suspension like this, but for Adderall? It might give him better focus, but he clearly had a medical reason to take it. Per the MLB Drug Rules is there much flexibility when it comes to something like this, i.e., previous exemption?