A Client Diagnosed with Narcolepsy Is Prescribed Ephedrine,and Asks the Nurse

A client diagnosed with narcolepsy is prescribed ephedrine,and asks the nurse how this medication will improve the problem.The nurse's response will be based on which physiologic concept?

A) Ephedrine will prevent any attacks of epilepsy.
B) Ephedrine can be easily destroyed by the enzymes in the synaptic cleft.
C) Ephedrine can easily cross the blood-brain barrier.
D) Ephedrine cannot be easily absorbed through the intestinal tract.