dementia

insane, mad, lunatic; crazy, crazed, aliene, non compos mentis; not right, cracked, touched; bereft of reason; all possessed, unhinged, unsettled in one's mind; insensate, reasonless, beside oneself, demented, daft; phrenzied, frenzied, frenetic; possessed, possessed with a devil; deranged, maddened, moonstruck; shatterpated; mad-brained, scatterbrained, shatterbrained, crackbrained; off one's head., maniacal; delirious, lightheaded, incoherent, rambling, doting, wandering; frantic, raving, stark staring mad., corybantic, dithyrambic; rabid, giddy, vertiginous, wild; haggard, mazed; flighty; distracted, distraught; bewildered (uncertain).