Choice
13)
A client is admitted to the psychiatric unit with acute onset of schizophrenia. The physician orders the phenothiazine chlorpromazine, 100 mg by mouth four times per day. Before administering the drug, a nurse reviews the client's medication history. Concomitant use of which drug is likely to increase the risk of extrapyramidal effects?

alcohol
droperidol
lithium carbonate
guanethidine