A nurse is caring for a client who received verapamil 1 hr ago and now has a blood pressure of 80/54 mm Hg. Which of the following actions should the nurse plan to take?

A. Administer supplemental oxygen: Oxygen may be useful in cases of respiratory compromise or hypoxia, but hypotension from verapamil is due to vasodilation and decreased cardiac output. Oxygen alone does not directly address the underlying cause of the low blood pressure. B. Position the client's legs in a dependent position: Placing the legs in a dependent position can slightly increase venous return, but it is not sufficient to manage symptomatic hypotension. More active interventions, such as fluid resuscitation, are typically required in drug-induced hypotension. C. Administer a bolus of IV fluids: Verapamil, a calcium channel blocker, can cause hypotension due to vasodilation. Administering a bolus of IV fluids increases circulating volume, helping to improve preload and raise the client’s blood pressure more effectively and promptly. D. Administer a dose of IV diphenhydramine: Diphenhydramine is an antihistamine used for allergic reactions, not for treating hypotension related to calcium channel blockers. It offers no therapeutic benefit in this context and may further sedate the client.