If you have an attention deficit or mood disorder, almost by definition an appropriate medication regimen will enhance your focus, or more accurately bring it to a functional level. Whether focus affects chess performance for you is a test in the wild. Good luck in any case.
Now all that was too serious. Three gulps of absinthe and you'll have a damn good excuse not to focus. In fact, I doubt the screen will even be in focus.
I do wonder if I have such a disorder...though I doubt it is to any diagnosable extent. Sounds a little silly but I wonder if I have a "patience" or impulsivity disorder...if such a thing is even named as such yet. I am thinking to see a specialist soon. I would like my chess to stop sufferingn from bad moves that are within my ability to see.

Thank you Pesadilla! I was hoping that someone would get the reference