Problem: A 25-year-old man who takes clonidine for Tourette syndrome reports a recent worsening of his tics which is causing him emotional distress. The clinician recommends discontinuing the clonidine and starting pimozide. The patient is advised to slowly taper the clonidine to prevent which of the following from occurring? A. Atrial fibrillation B. Orhtostatic hypotension C. Bradycardia D. Rebound hypertension