A client with a history of painful, continuous muscle spasms is prescribed diazepam, 2 mg P.O. twice daily. The client states the medication is effective and requests to use it long term. Which response by the nurse is most appropriate?

a. The healthcare provider will stop this medication if you develop bradycardia.
b. Continue to take this medication as long as it's effective.
c. If the side effects are minimal, the medication can be continued indefinitely.
d. Long-term use of this medication may result in addiction.