A patient has taken phenytoin (Dilantin) for 2 months. The patient is concerned about the different ...

A patient has taken phenytoin (Dilantin) for 2 months. The patient is concerned about the different appearance of the capsules in the most recent prescription. The nurse verifies the label and dosage.
 
  What instructions should the nurse provide to the patient?
  a. Discard the medication and obtain a new prescription.
  b. The prescription is correct. The appearance may be different if a different pharmaceutical company produced the capsules, although the effectiveness would not be altered.
  c. You should consistently receive the same formulation to maintain a constant blood level.
  d. Take the medication back to the pharmacy where you got it filled and alert the pharmacist.