Final answer:
Before administering calcitonin-salmon, a nurse should assess for allergic reactions to shellfish to prevent an adverse reaction in clients with postmenopausal osteoporosis.
Step-by-step explanation:
The student is asking about the precautions a nurse should take before administering calcitonin-salmon to a client with postmenopausal osteoporosis. Before giving calcitonin-salmon for the first time, the nurse should assess for allergic reactions to shellfish, as calcitonin-salmon is a form of calcitonin sourced from salmon, and individuals allergic to shellfish may also have an allergy to this medication. It is important to ensure the patient does not have an allergy to the medication to avoid a potential adverse reaction.