A Patient Has Been Taking Phenobarbital for 2 Weeks as Part

A patient has been taking phenobarbital for 2 weeks as part of his therapy for epilepsy.He says that he feels tense and that the "least little thing" bothers him now.What is the nurse's best explanation to the patient?

A) These adverse effects will often subside after a few weeks.
B) The drug should be stopped immediately because of possible adverse effects.
C) This drug causes the rapid eye movement (REM) sleep period to increase, resulting in nightmares and restlessness.
D) This drug causes deprivation of REM sleep and may cause the inability to deal with normal stress.