Psychiatrists traditionally warn patients about effects on attention, alertness, and motor function. Rarely, if ever, do we discuss in detail any negative effects on cognition. The only notable exception to this oversight involves the effects of ECT on memory. The purpose of this Special Report on cognition and cognitive disorders is to raise the consciousness of mental health clinicians to less obvious, but important, effects that illness and treatment have on cognition. With additional research and knowledge, we can strengthen our partnership with patients in shared decision-making and make further advancements in quality of life for people with mental illness. For details, see: Introduction: Cognition, Rarely Discussed.