Which statement best characterizes potential adverse effects of long-term amiodarone use?

Which statement best characterizes potential adverse effects of long-term amiodarone use?

• A. All of the above
• B. Thyroid dysfunction only
• C. Pulmonary fibrosis only
• D. Liver injury only

Answer: (D)

Amiodarone can affect several organs when used long term, so adverse effects are not limited to one system. The lungs are a key concern, with potential pulmonary toxicity ranging from pneumonitis to fibrosis, which can be serious. The thyroid is also commonly affected because the drug contains iodine and can disrupt thyroid hormone production, leading to either hypothyroidism or hyperthyroidism. Liver injury is another well-recognized risk, often seen as elevated liver enzymes or hepatitis with chronic use. Because these adverse effects can occur in different organs, the statement that encompasses all of them is the most accurate representation of potential risks. In practice, this means baseline and periodic monitoring of thyroid function and liver enzymes, plus vigilance for respiratory symptoms, is important during long-term amiodarone therapy.

Amiodarone can affect several organs when used long term, so adverse effects are not limited to one system. The lungs are a key concern, with potential pulmonary toxicity ranging from pneumonitis to fibrosis, which can be serious. The thyroid is also commonly affected because the drug contains iodine and can disrupt thyroid hormone production, leading to either hypothyroidism or hyperthyroidism. Liver injury is another well-recognized risk, often seen as elevated liver enzymes or hepatitis with chronic use. Because these adverse effects can occur in different organs, the statement that encompasses all of them is the most accurate representation of potential risks. In practice, this means baseline and periodic monitoring of thyroid function and liver enzymes, plus vigilance for respiratory symptoms, is important during long-term amiodarone therapy.