A nurse is caring for a client with hypercalcemia who is prescribed nasal calcitonin. How would the nurse teach the patient to administer the medication?

Rationale: A. While nosebleeds should be reported, this is not an administration instruction. B. Cleaning the nostril before and after is not typically required and could irritate mucosa. C. Alternating nostrils daily helps prevent irritation and promotes better absorption, which is the correct teaching. D. Vitamin D supplements may increase calcium levels, which is contraindicated in hypercalcemia.