A nurse is reviewing the vital signs of a client who has a prescription for imipramine. Which of the following findings requires follow-up by the nurse?

A. Imipramine is a tricyclic antidepressant (TCA) that can cause orthostatic hypotension due to alpha-adrenergic blockade. A blood pressure of 88/64 mm Hg is hypotensive and requires follow-up because it increases the client’s risk for dizziness, syncope, and falls. B. A pulse rate of 66/min is within normal limits for an adult and does not require follow-up unless accompanied by other concerning symptoms. C. A respiratory rate of 16/min is within the expected range (12–20/min) and does not indicate a complication. D. A temperature of 36.7°C (98°F) is within normal limits and does not require intervention.