A nurse is talking with a client who has been taking levothyroxine to treat hypothyroidism.The nurse should instruct the client to avoid taking which of the following over-the-counter medications within 4 hr of taking levothyroxine?

Choice A rationale:Fish oil supplements do not have a known interaction with levothyroxine.Choice B rationale:Calcium supplements can interfere with the absorption of levothyroxine. They should be taken at least four hours apart from levothyroxine.Choice C rationale:While bulk-forming laxatives can interfere with the absorption of some medications, there’s no specific evidence they interfere with levothyroxine.Choice D rationale:Oral antihistamines do not have a known interaction with levothyroxine.