A patient has been admitted to the inpatient unit for an epi…

A patient has been admitted to the inpatient unit for an episode of mania, which resulted in the patient spending several thousand dollars on scam investments on the internet. The patient has not been successfully treated with second-generation antipsychotic medications. The doctor started the patient on Prolixin (fluphenazine). The patient experienced urinary retention. Which of the following medications should the nurse expect the doctor to order to treat this side effect?