A nurse is preparing to administer verapamil by IV bolus to a client who is having cardiac dysrhythmias. For which of the following adverse effects should the nurse monitor when giving this medication?

A. Hypotension: Verapamil is a calcium channel blocker that can cause vasodilation, leading to a decrease in blood pressure. Hypotension is a well-known and common adverse effect, especially when administered via IV bolus, and should be closely monitored. B. Hyperthermia: Hyperthermia (elevated body temperature) is not typically associated with verapamil. This is not a common side effect of the drug. C. Ototoxicity: Ototoxicity (hearing damage) is not a known side effect of verapamil. It is more commonly seen with other medications, such as certain antibiotics or diuretics, but not with calcium channel blockers like verapamil. D. Muscle pain: Muscle pain or weakness is not a typical side effect of verapamil. While muscle-related symptoms can occur with certain medications, verapamil is more commonly associated with effects like hypotension, bradycardia, or constipation.