A nurse is teaching a client who is taking intranasal calcitonin to alternate nares daily when administering the medication. Which of the following adverse effects should the nurse expect to improve following the teaching?

A. Warmth of the face: Facial flushing or warmth can occur as a common side effect of calcitonin, but alternating nares does not prevent or reduce this reaction. It is typically transient and related to the medication’s vasodilatory effect. B. Esophagitis: Esophagitis is primarily a concern with oral or injectable forms of certain medications, not intranasal calcitonin. Alternating nares has no impact on esophageal irritation. C. Dyspnea on exertion: Shortness of breath may indicate an underlying cardiopulmonary issue rather than an intranasal medication effect. Alternating nares does not influence respiratory function. D. Rhinitis: Rhinitis, or nasal irritation, is a common adverse effect of intranasal calcitonin. Alternating nares daily helps reduce localized irritation and promotes better mucosal recovery, improving comfort and adherence to therapy.