A nurse is taking a medication history from a client who has a new prescription for levothyroxine. The nurse should instruct the client to wait 4 hr after taking levothyroxine before taking which of the following supplements?
Ginkgo biloba
Calcium
Vitamin C
Zinc
The Correct Answer is B
Calcium can interfere with the absorption of levothyroxine when taken concurrently, potentially reducing its effectiveness. Therefore, it is recommended to separate the administration of these two medications by at least 4 hours to avoid this interaction.
A,C,D-No effect on absorption of levothyroxine
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
PT measures the time it takes for blood to clot, and it is particularly relevant for clients taking warfarin because warfarin works by inhibiting the synthesis of certain clotting factors, including factors II, VII, IX, and X, which are involved in the PT pathway. Monitoring PT levels helps ensure that the client is receiving an appropriate dose of warfarin to prevent clot formation without causing excessive bleeding.
B. Total iron-binding capacity (TIBC) is a test used to assess iron levels in the blood and is unrelated to warfarin therapy.
C. WBC (White Blood Cell count) is a test used to assess the number of white blood cells in the blood and is unrelated to warfarin therapy.
D. PTT (Partial Thromboplastin Time) is a test used to evaluate the intrinsic and common pathways of the coagulation cascade. It is used in the monitoring of heparin anticoagulant therapy. It is not typically used to monitor warfarin therapy
Correct Answer is B
Explanation
- Theophylline is used in the management of asthma and COPD which present with wheezing and respiratory distress. COPD is characterized by chronic inflammation of the airway and increased mucus secretion leading to obstruction of airflow. Theophylline stimulates the respiratory centers to increase ventilation.
A- No effect on blood pressure C- increases urine output
D-Theophylline is a CNS stimulant
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