A nurse is caring for a client who has just begun therapy with alprazolam to treat anxiety. The nurse should monitor the client for which of the following adverse effects of this medication?

A. Bradycardia: Alprazolam (Xanax) is a benzodiazepine. While it can lower blood pressure slightly due to relaxation, severe bradycardia is not a standard side effect unless taken in toxic overdose with other depressants. B. Insomnia: While benzodiazepines are CNS depressants usually causing sedation, they can occasionally cause a paradoxical reaction (especially in older adults or children), resulting in excitation, euphoria, anxiety, rage, or insomnia. Furthermore, rebound insomnia can occur if the medication is stopped abruptly. C. Hearing loss: Ototoxicity is associated with drugs like aminoglycosides (Gentamicin) or loop diuretics (Furosemide), not benzodiazepines. D. Hypertension: Benzodiazepines typically cause hypotension (low blood pressure) and orthostatic changes, not hypertension.