A nurse is caring for a client who has Graves' disease and is to start therapy with propylthiouracil. The nurse should expect which of the following outcomes?
Increased Hct
Decreased WBC count
Decreased heart rate
Increased blood pressure
The Correct Answer is C
A. Increased Hct. Propylthiouracil (PTU) is an antithyroid medication that reduces excessive thyroid hormone production in Graves' disease. It does not directly affect hematocrit (Hct) levels. While anemia can occur in some clients with untreated hyperthyroidism, PTU itself is not expected to raise Hct.
B. Decreased WBC count. A serious adverse effect of PTU is agranulocytosis, which results in a dangerously low white blood cell (WBC) count, increasing the risk of infection. However, this is a potential complication rather than an expected therapeutic outcome. Clients on PTU require regular monitoring of WBC levels to detect early signs of agranulocytosis.
C. Decreased heart rate. Graves’ disease causes hyperthyroidism, which increases metabolism and leads to symptoms such as tachycardia. PTU works by inhibiting thyroid hormone synthesis, leading to a gradual reduction in heart rate as thyroid function normalizes. This is a desired outcome of treatment, helping to reduce cardiovascular strain associated with hyperthyroidism.
D. Increased blood pressure. Hyperthyroidism can cause elevated blood pressure due to increased cardiac output. As PTU lowers thyroid hormone levels, blood pressure is expected to decrease or stabilize rather than increase. An increase in blood pressure would be unexpected and may indicate another underlying issue requiring evaluation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Rash. A rash while taking allopurinol can indicate a serious hypersensitivity reaction, including Stevens-Johnson syndrome (SJS) or toxic epidermal necrolysis (TEN). These life-threatening conditions involve widespread skin blistering, mucosal involvement, and systemic symptoms. Immediate discontinuation of allopurinol and medical intervention are required to prevent severe complications.
B. Diarrhea. Mild gastrointestinal disturbances, including diarrhea, are common with allopurinol use. While bothersome, diarrhea is not life-threatening and can often be managed by adjusting the dose or taking the medication with food. It does not require immediate discontinuation unless severe or persistent.
C. Nausea. Nausea is a common, mild side effect of allopurinol that usually resolves with time or by taking the medication after meals. It is not an emergency and does not require urgent intervention unless accompanied by other concerning symptoms such as vomiting or severe abdominal pain.
D. Metallic taste in mouth. A metallic taste can occur with allopurinol use but is not harmful. It is a minor side effect that does not indicate toxicity or severe adverse reactions. Clients can be reassured that this effect is temporary and not a reason to stop the medication.
Correct Answer is B
Explanation
A. Tinnitus. Phenytoin is not commonly associated with tinnitus. Ototoxicity is more frequently linked to medications such as aminoglycoside antibiotics, loop diuretics, or high-dose aspirin. While phenytoin affects the nervous system, it does not typically cause ringing in the ears.
B. Bleeding gums. Gingival hyperplasia, characterized by swollen and bleeding gums, is a well-known adverse effect of phenytoin, especially with long-term use. It occurs due to an overgrowth of gum tissue and can be minimized with good oral hygiene and regular dental care. Clients should be advised to brush with a soft-bristled toothbrush and visit the dentist regularly.
C. Jaundice. Although phenytoin is metabolized by the liver, hepatotoxicity and jaundice are not common side effects. However, liver function should still be monitored, particularly in clients with pre-existing liver conditions or those taking other hepatotoxic medications.
D. Deep vein thrombosis. Phenytoin does not significantly increase the risk of deep vein thrombosis (DVT). While some anticonvulsants may affect coagulation factors, phenytoin is not known to cause hypercoagulability or clot formation. Clients at risk for DVT should be monitored for other contributing factors, such as immobility or genetic predisposition.
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