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) Monitor blood pressure: This is the correct answer. Tamsulosin, like other alpha-blockers, can cause orthostatic hypotension, which is characterized by a sudden drop in blood pressure when transitioning from lying down or sitting to standing. Monitoring blood pressure, particularly when initiating therapy or adjusting the dosage, helps detect and manage hypotensive episodes. Clients should be advised to change positions slowly to minimize the risk of falls or injury. B) Assess urine output: While tamsulosin can affect urinary function by relaxing smooth muscle in the prostate and bladder neck, it typically does not significantly impact urine output. Therefore, monitoring urine output is not a primary intervention for assessing adverse reactions to tamsulosin. C) Obtain daily weights: Tamsulosin is not typically associated with significant fluid retention or changes in body weight. Daily weight measurements are more relevant for assessing fluid balance in clients receiving medications such as diuretics or those with conditions like heart failure or renal disease. D) Perform a bladder scan: Tamsulosin does not directly affect bladder volume or urinary retention to the extent that necessitates routine bladder scanning. Bladder scans are typically performed in clients with suspected urinary retention or those at risk for urinary retention due to conditions like BPH, but it's not a standard intervention for monitoring adverse reactions to tamsulosin.