Levothyroxine (Synthroid) Has Been Prescribed for a Patient with Hypothyroidism

question 11

Multiple Choice

Levothyroxine (Synthroid) has been prescribed for a patient with hypothyroidism. The nurse reviews the patient's current medications for potential interactions. Which of these drugs or drug classes interact with levothyroxine?

• A) Phenytoin (Dilantin)
• B) Estrogens
• C) Beta blockers
• D) Warfarin (Coumadin)
• E) Penicillins
• F) Iron supplements

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