demented

ADJECTIVEsuffering from dementia.synonyms:unbalanced · of unsound mind · mentally ill · deranged · crazed · distracted · troubled · disturbed · unhinged · insane · mad · mad as a hatter · mad as a March hare · [more]informalBRITISHdriven to behave irrationally due to anger, distress, or excitement. CITE: http://www.dictionary.com