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I am taking levothyroxin and wondered how long the pills are effective after the expiration date?

Answers (1)

21 Mar 2011

They are not good after the expiration date, especially levothyroxine.

Drugs work differnet from food expirations. A drug is considered exired when 10% of the active drug has broken down. In most cases, it doesn't hurt someone but it doesn't help.

In the case of Levothyroxine, you do not want fluctations of drug. A small difference in pills means a big difference in the body. This is what is called "narrow therapeutic'

It is posible that taking the expired medicine will make you hypothyroid.

Brian PharmD Candidate

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