John Has Been Diagnosed with Schizophrenia and Has Shown Improvement

Multiple Choice

John has been diagnosed with schizophrenia and has shown improvement in positive symptoms while taking chlorpromazine (CPZ) . You would expect his positive schizophrenia symptoms to return if John

A) stops taking CPZ and takes part in a cocaine party.
B) takes double his CPZ dose per day.
C) takes reserpine in addition to CPZ.
D) mixes alcohol with CPZ.
E) ingests alpha-methyl-para-tyrosine in addition to CPZ.