A newly admitted client has taken thioridazine (Mellaril) for 2 years with good symptom control. Symptoms exhibited on admission included paranoid delusions and hallucinations. The nurse should recognize which potential cause for the return of these symptoms?
A. The client has developed tolerance to the antipsychotic medication.
B. The client has not taken the medication with food.
C. The client has not taken the medication as prescribed.
D. The client has combined alcohol with the medication.
ANS: C