A patient took trifluoperazine 30 mg po daily for 3 years. The clinic nurse notes that the patient grimaces and constantly smacks both lips. The patient's neck and shoulders twist in a slow, snakelike motion. Which problem would the nurse suspect?
a. Agranulocytosis
b. Tardive dyskinesia
c. Tourette's syndrome
d. Anticholinergic effects
Answer: B