A nurse is caring for a client who started taking amitriptyline 6 days ago. The client reports that the medication is not helping. Which of the following responses should the nurse make?

A. It is premature to change medications after only 6 days, as antidepressants may take several weeks to show therapeutic effects. B. Dose adjustments should be done cautiously, and waiting for the full therapeutic effect is important before making changes. C. Administration instructions do not significantly impact the speed of therapeutic effects. D. This is the correct answer because amitriptyline is a tricyclic antidepressant that takes 2 to 4 weeks to reach its full effect.