A nurse is reinforcing teaching with a client who has a new prescription for alendronate for the treatment of osteoporosis. The nurse should instruct the client to monitor for which of the following adverse effects?

The correct answer is B: Jaw pain. Alendronate, a bisphosphonate medication used to treat osteoporosis, can cause a rare but serious side effect called osteonecrosis of the jaw (ONJ), characterized by jaw pain, swelling, and possible infection. It is essential for the nurse to instruct the client to monitor for any signs of jaw pain to promptly report to their healthcare provider. Anorexia (A), insomnia (C), and bruising (D) are not typically associated with alendronate use for osteoporosis and would not be common adverse effects that the client needs to monitor for.