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Phenobarbital and other barbiturates should be used with care in children and elderly patients and in patients with impaired hepatic, renal or respiratory function and are contraindicated when the impairment is severe.
Effects on the Ability to Drive or Operate Machinery: Phenobarbital and other barbiturates cause drowsiness and patients receiving them, if affected, should not take charge of vehicles or machinery where loss of attention could cause accidents.
