How to Go About Switching from One Brand of T3 to Another

This is a question that comes up a lot from patients. 

If someone is on one type of T3 (or even NDT) and it is being taken in several doses per day, but they have to change brands, how is the best way to go about this?

Well, do not wait until one type runs out before switching over to the new brand. Swapping over all doses at once is not advisable, as the brands may have different strengths and may even have unwanted side effects.

This advice I always give to patients is to pick the last dose of the day and take the equivalent of the same dose in the new brand.

It might not work the same way. Give it at least a month to assess it, and adjust the new dose strength in tiny amounts in order to make it work in the same way as the previous brand.

At the end of this last-dose-adjustment-process, you will know the equivalent strength of the new brand compared to the old brand.

You can now safely adjust one of the other doses and fine-tune if you need to.

Proceed in this way until all the doses are switched over.

The main thing to do is to start early, well before your old brand has run out.

I hope this helps.

Best wishes,

Paul