A nurse in a long-term care facility is contributing to the plan of care for a client who has a new prescription for propranolol. The nurse should plan to monitor the client for which of the following adverse effects of the medication?

A. Ringing in the ears (tinnitus) is incorrect. Tinnitus is not a common adverse effect of propranolol. This symptom is more commonly associated with ototoxic medications, such as certain antibiotics or diuretics. B. Bradycardia is correct. Propranolol is a beta-blocker that reduces heart rate and blood pressure by blocking beta-adrenergic receptors. One of its primary adverse effects is bradycardia (slow heart rate., which can lead to dizziness, fatigue, or hypotension. C. Hypertension is incorrect. Propranolol is used to treat hypertension, not cause it. By reducing cardiac output and suppressing sympathetic nervous system activity, propranolol generally lowers blood pressure. D. Headache is incorrect. While some clients might experience headaches due to changes in blood pressure, headache is not a primary adverse effect of propranolol.