Intranasal Dexmedetomidine vs. Standard of Care for Emergency Department (ED) Procedural Sedation in the Older Adult

Inclusion Criteria: * 65 years of age and older * Patients in need of sedation prior to either a computerized tomography (CT) or magnetic resonance imaging (MRI) Exclusion Criteria: * Patients who weigh \< 50 kg * Cardiac arrhythmias or QTc \>450 * Intravenous access not standard of care or unable to obtain * Patients with any allergies or contraindications to dexmedetomidine, haloperidol (i.e. patients diagnosed with Parkinson's) or lorazepam * Patients with low blood pressure, defined as a less than 100/60 mmHg * Patients with bradycardia (Heart rate \< 60 bpm) * Patients presenting with chief complaint of respiratory distress/failure * Intranasal administration contradictions: nasal septal abnormalities, nasal trauma, epistaxis, excessive nasal mucus or blood, and intranasal damage, recent use of nasally administered vasoconstrictors such as cocaine, oxymetazoline, and phenylephrine