Thyroid UK
89,135 members103,655 posts

In France health risk with modified treatment for Thyroide


In France since March 2017, Merck labs have modified the ingredients of Levothyrox, a treatment given to patients with thyroide problems.

I have been given this new treatment and I am suffering from vertigo, change of humeur, tiredness etc;

There is a huge petition in France to get this drug changed back to its previous formula.

No one was informed about this change.

Its the biggest drug sold for over 1 million people in France.

Do you think that maybe yours could have been changed too in the UK?

3 Replies


Levothyrox isn't used in the UK. A couple of members complained about the changes Merck made to Levothyrox at the weekend and this was posted:

English Translation:


Haven't heard.

What's the difference?


Hi again broo. I see that's just been answered in your other reply!


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