A nurse caring for a client who has a new prescription for atenolol. For which of the following adverse effects should the nurse monitor the client?

A) Neutropenia Neutropenia refers to an abnormally low level of neutrophils, a type of white blood cell. While certain medications, such as chemotherapy agents and some antipsychotic drugs, can cause neutropenia, atenolol (a beta-blocker) is not typically associated with this side effect. Atenolol primarily affects the cardiovascular system by reducing heart rate and blood pressure, and it is not known to cause significant changes in white blood cell counts. B) Bradycardia Bradycardia, or a slower-than-normal heart rate, is a well-known and common adverse effect of beta-blockers, including atenolol. Beta-blockers work by blocking beta-adrenergic receptors, which decreases the heart rate and the force of contraction, as well as lowering blood pressure. In some individuals, this can lead to excessively low heart rates, which could be dangerous if the heart rate drops too much. Bradycardia can lead to symptoms such as dizziness, fainting, or fatigue, and may require dose adjustments or discontinuation of the medication C) Anemia Anemia, which is a condition characterized by a low red blood cell count or low hemoglobin levels, is generally not a common adverse effect of atenolol. While certain medications like some chemotherapeutic agents, NSAIDs, or antibiotics may cause anemia due to their effects on the bone marrow or by causing gastrointestinal bleeding, atenolol is not typically linked to this side effect. D) Hypokalemia Hypokalemia (low potassium levels) is typically associated with the use of diuretics or other medications that cause the kidneys to excrete more potassium, such as some classes of antibiotics and corticosteroids. However, atenolol, being a beta-blocker, does not directly affect potassium levels.