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?

A. Anorexia. While gastrointestinal side effects such as nausea and esophageal irritation can occur with alendronate, anorexia is not a common adverse effect. If severe nausea leads to decreased appetite, the client should report this to their provider, but it is not a primary concern compared to more serious side effects. B. Jaw pain. Jaw pain can indicate osteonecrosis of the jaw (ONJ), a rare but serious adverse effect associated with long-term bisphosphonate use. This condition involves poor bone healing, especially after dental procedures, and can lead to bone deterioration. Clients taking alendronate should report any persistent jaw pain and undergo regular dental exams to monitor bone health. C. Insomnia. Alendronate does not typically cause insomnia. While some medications, such as corticosteroids and stimulants, are linked to sleep disturbances, alendronate does not affect the central nervous system in a way that would disrupt sleep patterns. D. Bruising. Alendronate does not interfere with platelet function or coagulation, making bruising an unlikely adverse effect. Clients who experience unexplained bruising should be evaluated for other underlying causes, such as blood disorders or medication interactions.