ATI PN Pharmacology 2020 Updated 2024

ATI PN Pharmacology 2020 Updated 2024 ( 61 Questions)

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?


Correct Answer: B

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.




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