Hello, "unable to function" caught my eye due to this being my problem of several years past. I discovered a a "brain formula" dietary supplement called EHT from NERIUM International. I have taken this supplement for over 6 months and have been convinced that the ingredients have stimulated a part of my brain that my psychiatric RX didn't did not. Results? I'm more focused, less fatigued, and have been able to accomplish my daily activities to a level I couldn't before EHT. My functioning was even better when I doubled the dosage to 2 tablets daily. My Kaiser PCMD said this dietary supplement has been added to their list of "sanctioned" supplements. Hope this is helpful to you. Jeanne