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

Tamsulosin is an alpha-1 adrenergic receptor blocker that is commonly used to treat benign prostatic hyperplasia (BPH). One of the potential adverse reactions of tamsulosin is hypotension, which can be manifested as dizziness, lightheadedness, and fainting. Therefore, monitoring blood pressure is a crucial intervention for clients receiving tamsulosin. Assessing urine output (option a) and performing a bladder scan (option b) may be appropriate interventions for clients with urinary retention or other urinary tract issues, but they are not specific to monitoring adverse reactions to tamsulosin. Obtaining daily weights (option d) may be useful for monitoring fluid balance in some clients, but it is not directly related to adverse reactions to tamsulosin.