About to start taking T3 along with the Levothyroxine T4 prescribed

Notes gained from American endocrinology pages.

TSH that is elevated beyond the normal reference range. For most labs, this is about 4.0 to 4.5.

Free T3 and Free T4 should be above the median but below the upper end of the laboratory normal reference range. Elderly patients, the numbers should be in the middle of its range.

T3 does 90% of the work of the thyroid in the body.

Patients need to be warned about the over-dosage symptoms which are frequently only temporary during the adaptation stage. The symptoms may include:



feeling hot and sweaty,

rapid weight-loss,

fine tremor,

clammy skin.

The leaflet for the T3 says don't take T3 if have Angina or other heart or circulation health problems.

Don't take T3 if over-active thyroid.

Or pregnant or breast feeding.

The elderly keep dosage longer in the body than other ages, so be careful about over-dosage.

Be careful if you are a Diabetic, as the T3 tablets can raise blood sugar levels.

Be careful if you have high blood pressure.

Liothyronine Sodium Tablets may affect or be affected by the following medicines: • Anticoagulants (e.g. warfarin) used to thin the blood and prevent blood clots

• Anticonvulsants (e.g. carbamazepine or phenytoin) used to prevent fits • Insulin and other treatments for diabetes • Medicines called cardiac glycosides (e.g. digoxin) used to treat heart conditions such as heart failure • Tricyclic antidepressants (e.g. amitriptyline / imipramine) used to treat depression • Colestyramine / colestipol which reduces the level of cholesterol (fats) in the blood • Oral contraceptives (‘the pill’) • Amiodarone, used to treat irregular heart beats • Barbiturates, used to induce sleep and decrease anxiety • Primidone, used for seizures or fits.

11 Replies

  • Thank you. The extract is informative and helpful.

  • This T3 info is interesting. I didn't get an info leaflet. Just a pot of pills!

    Thank you T4NotWorking


  • Are you taking Mercury Pharma Liothyronine T3 ? If so and your tablets were issued in the original white container complete with batch number.......If you peel back the outer label surrounding the pot ...the information leaflet is folded around it.

  • Hey, I found it.

    Cheers Marfit74.

  • Glad to have helped.......make sure they always issue your T3 in the official sealed container so that you have the batch number in case of any problems with it. x

  • I wonder what they mean by 'elderly'? Do you have a link to their site please T4NotWorking? Thanks for posting.

  • As I am definitely elderly it was interesting to know that my numbers should be midway in range......I have an Endo app.at start of August so will be interesting to see where I'm at after 14 months on T3.

    Thanks for posting from me too.

  • T4NotWorking....I'm assuming you've read Paul Robinsons book/blog?

  • How to keep the population sick and docile, and fill Big Pharma's coffers!

  • Thanks for posting this T4NotWorking. I am about to start T3 tomorrow after a week of reduced T4, so this is most interesting and useful knowledge for me.

  • Can't understand why they say don't take T3 when breast feeding. For decades, Natural desiccated Thyroid was the only thyroid medication and there must have been millions of women who were pregnant or breast feeding during that time, in fact NDT these days could be the medication that helps women conceive.

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