A nurse is caring for a newly admitted patient who will receive Digoxin to treat cardiac dysrhythmia.
The patient takes hydrochlorothiazide and reports regular use of OTC laxatives.
Before administering the first dose of Digoxin, the nurse will review the patient’s electrolyte levels with careful attention to which electrolytes?

Choice A rationale

Coagulation studies assess the blood's ability to clot and are not directly related to the monitoring of phenytoin therapy. These tests are more relevant for patients with bleeding disorders or those on anticoagulant therapy.

Choice B rationale

Serum electrolytes, including levels of sodium, potassium, and calcium, are important for overall health but are not specifically indicative of phenytoin levels. Phenytoin may affect calcium metabolism, but it is not the primary focus for routine monitoring.

Choice C rationale

Renal function tests are crucial for assessing kidney function but do not directly monitor phenytoin therapy. Phenytoin is primarily metabolized in the liver, making liver function tests more relevant.

Choice D rationale

Blood glucose levels should be monitored in patients taking phenytoin as the drug can cause alterations in blood glucose levels. Both hypoglycemia and hyperglycemia have been reported, so it is important to check glucose levels to ensure they remain within a normal range.

Choice A rationale

The rebound effect is typically associated with decongestants rather than topical nasal steroids. It occurs when nasal congestion worsens after stopping decongestant use.

Choice B rationale

Local ulceration is a potential adverse reaction to topical nasal steroids due to the localized irritation and thinning of the nasal mucosa with prolonged use.

Choice C rationale

Increased nasal drainage is not a common adverse reaction to topical nasal steroids. These medications typically reduce inflammation and decrease nasal drainage.

Choice D rationale

Suppression of healing is not an adverse reaction associated with topical nasal steroids. These drugs are more likely to reduce inflammation and promote healing of the nasal mucosa.