What is a potential serious complication of abrupt cessation of beta-blockers like metoprolol?

A. Rebound hypertension: Abruptly stopping beta-blockers can cause a sudden increase in sympathetic activity, leading to elevated blood pressure and heart rate. This rebound effect increases the risk of angina, myocardial infarction, or stroke in susceptible patients. Gradual tapering is necessary to prevent these serious cardiovascular complications. B. Sedation: Beta-blockers do not typically cause sedation, and abrupt cessation is unlikely to result in drowsiness. Monitoring for sedation is not a priority in this context. C. Hypoglycemia: Beta-blockers can mask hypoglycemia symptoms but do not usually cause low blood glucose upon withdrawal. Abrupt cessation does not directly induce hypoglycemia. D. Hyperkalemia: Beta-blockers do not typically alter potassium levels significantly, and sudden discontinuation is unlikely to cause hyperkalemia. Electrolyte disturbances are not a primary concern in this scenario.