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. Dyspnea on exertion: Dyspnea on exertion is not a known adverse effect of intranasal calcitonin. It is more commonly associated with cardiopulmonary conditions and would require further assessment rather than adjustments in nasal medication administration. B. Warmth of the face: Facial warmth or flushing can occur as a systemic side effect of calcitonin, but it is not related to nasal administration technique. Alternating nares will not prevent or improve this reaction. C. Esophagitis: Esophagitis is typically linked to oral bisphosphonates rather than intranasal calcitonin. Since calcitonin is administered through the nasal mucosa, it bypasses the gastrointestinal tract entirely and does not contribute to esophageal irritation. D. Rhinitis: Rhinitis, or nasal irritation and inflammation, is a common local side effect of intranasal calcitonin. Alternating nares daily helps minimize mucosal irritation and promotes healing, reducing the likelihood and severity of rhinitis.