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Complex drug-drug-disease interactions between amiodarone, warfarin ...

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Abstract: Many patients with cardiac arrhythmias require concomitant therapy with warfarin and amiodarone. Beyond the predictable pharmacokinetic drug-drug interaction requiring a significant warfarin dose reduction, the iodine-rich amiodarone affects the thyroid gland, causing overt hypothyroidism or thyrotoxicosis in 14%-18% of cases.