A nurse is caring for a client who has major depression and a new prescription for citalopram. Which of the following adverse effects is the priority for the nurse to report to the provider?

Digoxin is a cardiac glycosidethat inhibits the sodium-potassium ATPasepump, increasing intracellular calcium and myocardial contractility. It possesses a narrow therapeutic index, making toxic accumulations common. Early toxicity manifests as anorexia, nausea, and blurred or yellow-tinted vision, while severe toxicity causes life-threatening dysrhythmias.

Rationale:

A.Notifying the provider is a necessary step in the management of a medication error, but it is not the initial action. The nurse must first possess objective clinical data regarding the client's current physiological status to provide a comprehensive report. Assessment always precedes notification in the nursing process to ensure the provider can make informed decisions.

B.Obtaining the client's vital signs is the priority action because the nurse must assess for immediate life-threatening complications like severe bradycardia or hypotension. Since digoxin significantly affects cardiac conduction, an overdose can trigger various arrhythmias. Assessing the client's stability provides the essential data needed to determine the urgency of further medical interventions.

C.Initiating a medication error incident report is an administrative requirement that ensures institutional quality improvement and safety tracking. However, documentation is never the first priority when a client's safety is potentially compromised by a pharmacological overdose. The nurse must focus on clinical assessment and stabilization before completing necessary internal paperwork regarding the error.

D.Checking the client's digoxin level is an important diagnostic step to quantify the severity of the overdose, but it takes time to process. Laboratory results do not provide immediate information about the client's current hemodynamic tolerance of the excess dose. The nurse should prioritize the physical assessment of the client over waiting for laboratory confirmation of serum levels.

Phenytoin is a hydantoin anticonvulsantthat stabilizes neuronal membranes by delaying the influx of sodium ions during action potentials. It has a narrow therapeutic indexand significant effects on cardiac conduction, specifically lengthening the refractory period. Due to its potential to depress myocardial automaticity, it is strictly avoided in patients with certain pre-existing conduction system abnormalities.

Rationale:

A.Sinus bradycardia is a major contraindication for phenytoin because the drug can further depress cardiac conduction and automaticity. Phenytoin possesses class IB antiarrhythmic properties, which can lead to severe cardiovascular collapse or heart block in patients with slow heart rates. Administering this drug to a bradycardic patient poses a life-threatening risk of asystole.

B.A history of cholecystitis, or inflammation of the gallbladder, does not contraindicate the use of phenytoin for seizure management. While phenytoin is metabolized by the liver, it does not have a direct impact on gallbladder function or the formation of gallstones. The nurse would prioritize monitoring liver enzymes rather than focusing on a history of cholecystitis.

C.Taking vitamin B12 supplements does not prevent a patient from receiving phenytoin, as there is no dangerous interaction between the two. Interestingly, long-term phenytoin use is actually associated with folate deficiency rather than issues with B12. Supplements are generally safe and may be necessary for patients with concurrent nutritional deficiencies during anticonvulsant therapy.

D.Ibuprofen is a non-steroidal anti-inflammatory drug that does not have a documented clinical contraindication with the administration of phenytoin. While phenytoin has many drug-drug interactions involving the cytochrome P450 system, ibuprofen is not typically one that causes toxicity. The nurse can safely administer both medications as long as standard monitoring is performed.