Thyroid UK

Is it ok to mix makes of T3?

I have recently realised there is a good chance I have never been on a large enough dose of T3 only & have increased up to 50mcg a day. I have been taking 2 x 25mcg of Cynomel a day which I bought from abroad.

I have found myself now being prescribed 35mcg a day of Mercury Pharma Liothyronine (T3) (40/30mcg alternate days) by the NHS & consider myself very fortunate.

I therefore have two different makes of T3 in my cupboard. I need to use the Mercury Pharma but not sure how to use both makes. Rotate monthly? Or another plan?

7 Replies
oldestnewest

I have 2 brands of T3 (self sourced Unipharma and Grossman Cynomel). I have found one stronger than the other. I tried alternating daily but it didn't seem to suit me so I have been using just one brand for a few weeks to try and find the right dose for that brand. After my next blood test I will be using the other brand on it's own to see what difference it makes.

I'm not sure alternating 40/30mcg doses is the best idea, due to T3 being quick acting In would have thought 35mcg daily would be better.

3 likes
Reply

The 40/30 alternate days was the endo's idea!

Reply

No surprise there! I don't think they know what they're doing most of the time.

3 likes
Reply

I was literally battling my way through that appointment to get whatever I could!

Reply

T3 is not a storage hormone so you need as near as possible the same dose every day

If you want to top up, then you probably need to add same amount of different brand each day on top of NHS T3

2 likes
Reply

I have been taking the same dose every day. I have never taken 40/30mcg on alternate days as endo wanted. I am constantly taking 50mcg a day. But it's whether I can mix the two brands on a daily or weekly basis.

Reply

You probably need to stick to same mix everyday

Eg 30 NHS and 20 other one

2 likes
Reply

You may also like...