A Patient Has Been Taking Carbamazepine (Tegretol)for Several Months and Is

A patient has been taking carbamazepine (Tegretol) for several months and is worried because the physician has increased her dose twice since beginning therapy.Which of the following is the nurse's best explanation to the patient?

A) The initial dose was not sufficient to prevent seizures.
B) Autoinduction results in lower-than-expected drug concentrations.
C) Because her seizures are difficult to manage, increased doses are needed to control them.
D) Forgetting to take the medication as prescribed led to a need for increased dosage.