A client with benign prostatic hyperplasia receives a new prescription of tamsulosin. Which intervention should the nurse perform to monitor for an adverse reaction?

A) Perform a bladder scan: While a bladder scan can be useful to assess for urinary retention in patients with benign prostatic hyperplasia (BPH), it does not specifically monitor for adverse reactions to tamsulosin. B) Monitor blood pressure: Tamsulosin is an alpha-1 adrenergic antagonist that can cause hypotension as a potential adverse effect. Therefore, monitoring blood pressure is crucial to identify any significant drops that could lead to dizziness or fainting, especially when the client first starts the medication or if the dosage is adjusted. C) Obtain daily weights: While monitoring weight can be important for assessing fluid retention or other conditions, it is not a direct measure of an adverse reaction related to tamsulosin. D) Assess urine output: Monitoring urine output is important in evaluating the effectiveness of the medication in relieving BPH symptoms, but it does not directly assess for the potential adverse effects of tamsulosin, such as hypotension.