Switching form T4 to T3 - help!

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Dear Sheila and other TPA members.

It has been a long time since I posted on this forum. I was diagnosed with

Hashimoto's in October 2009 and have since been increasing my dose of T4

(Eltroxin) and now am on 175mcg. Whilst I feel slightly better than two years

ago, I am still fighting the fatigue, feeling cold and cannot shift the weight

(Endo. says it is not due to my thyroid!).

I ordered T3 Cynomel from MexianDrugstore ages ago and occasionally take half a

25mcg tablet but I am scared of it to be honest. Then I read about

's book and have just ordered it from Amazon. I am going to ditch T4

for two weeks and start taking T3 in small doses to see if I feel any

differently. Can you advise about the dose, until the book arrives? I know the

T3 is 4 more times powerful than T4, so if I am taking 175mcg, would 40mcg be

about equivalent and not put me in danger? Many thanks for help and advice (as

soon as possible)!

Thanks Jayne Caveen