2. Types

Research identifies three types of delirium.

  • Hyperactive delirium is the most easily recognized and includes restless movements like pacing, agitation, rapid mood changes, and a refusal to cooperate with caregivers. Hallucinations may also develop.
  • Hypoactive delirium is characterized by lack of motor activity, general sluggishness, abnormal drowsiness, and dazed appearance.
  • Mixed delirium includes symptoms from both types, and the person may switch back and forth.
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