Well, it's obviously a medication issue at this point. The medication made it impossible for him to work. That means a mental or behavioral side effect so it could be anything from Goldie having to piss every 10 minutes to running crazy shirtless around Dana's interviews... or both. It sounds like it was something that increased since October to a certain point where in directly impacted his ability to perform.
Dana can't talk about it and neither can anyone else but his physician with has been vague. This probably means Goldie had to take FMLA leave to protect his job which needs consent of his physician. Drug issues are covered by HIPPA. If a coworker or boss talks about the reason for leave and it causes "issues" for the employability of the person taking leave there can be mega lawsuits.
Where does that leave us? Well, back at square one.... pure speculation.
So.. Sounds like Goldie probably started taking Adderall for part of a treatment for respiratory issues, it caused him to piss every 10 min, then the use got out of hand and you saw odd behaviors and judgement, Goldie needed treatment or he'd get fired, and with the laws in place now nobody can talk about it.
Meh.