Adenoma/surgery; Antidepressive Agents, Tricyclic/toxicity; Clomipramine/toxicity; Methylene Blue/toxicity; Parathyroid Neoplasms/surgery; Parathyroidectomy; Postoperative Complications/chemically induced; Selective Serotonin Reuptake Inhibitors/toxicity; Serotonin Syndrome/chemically induced; Adenoma/diagnosis; Aged; Antidepressive Agents, Tricyclic/administration & dosage; Clomipramine/administration & dosage; Critical Care; Dantrolene/therapeutic use; Drug Interactions; Electroencephalography/drug effects; Female; Glasgow Coma Scale; Humans; Infusions, Intravenous; Muscle Relaxants, Central/therapeutic use; Neurologic Examination/drug effects; Parathyroid Neoplasms/diagnosis; Postoperative Complications/diagnosis; Serotonin Syndrome/diagnosis; Serotonin Syndrome/drug therapy; Selective Serotonin Reuptake Inhibitors/administration & dosage