Final answer:
TSH levels should be checked around 3-6 months after initiating amiodarone therapy, and then regularly monitored to manage any thyroid function abnormalities.
Step-by-step explanation:
Thyroid-stimulating hormone (TSH) levels should be checked approximately 3-6 months after starting amiodarone therapy. Amiodarone can affect thyroid function, either causing hypothyroidism or hyperthyroidism, due to its high iodine content and the drug's complex interaction with thyroid hormone synthesis and metabolism.
Therefore, monitoring TSH is critical to ensure that thyroid function remains stable and to manage any potential thyroid abnormalities that may arise during amiodarone treatment. Furthermore, patients receiving amiodarone therapy should continue to have their TSH levels monitored regularly throughout the treatment.