L-T3 pharmaceutical equivalency, Part 2: New thyroid science

What does NEW thyroid science have to say on the topic of thyroid pharmaceutical equivalency? How many micrograms of L-T3 Liothyronine (i.e. Cytomel) are equivalent to L-T4 Levothyroxine (i.e. Synthroid)? Thyroid hormone pharmaceutical monographs currently provide very rigid and low-ratio equivalency statements: ERFA Canada says "Desiccated thyroid 60 mg is usually considered equivalent to ... …

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No, 25 mcg of L-T3 Liothyronine isn’t equivalent to 100 mcg L-T4

In thyroid therapy, how many micrograms of Cytomel (T3) are equivalent to how many micrograms of Synthroid (T4)? Equivalency statements in the product monographs for Pfizer Canada's Cytomel and for ERFA Canada's "Thyroid" (NDT brand) claim that a 25 mcg dose of Liothyronine sodium (L-T3) is "considered equivalent" to 100 mcg / μg (0.1 mg) …

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Thyroid therapies: What my life is like in the T3-monotherapy wheelchair

Here, I'll use my own personal example to discuss a few dimensions of T3 monotherapy, which I envision as a "wheelchair." I'm drawing on the fictional analogy I developed in an earlier post, where I imagined thyroid disease like crippling foot disease. The therapy of 100% T4 can be seen like a walking stick or …

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Several fallacies in the TSH-T4 paradigm of thyroid therapy

When you are steeped in a medical paradigm, its fallacies can be as comfortable and taken for granted as an old pair of sneakers. In this post, I'll take apart several thyroid therapy fallacies, starting with the fallacy "description is not prescription." I will investigate many of the ways in which patients on T4 monotherapy …

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In Winter, everyone gains T3 except thyroidless patients on T4

A 2017 article reported research on 11,806 healthy controls and 3,934 thyroidless people treated with L-T4 monotherapy in Sicily, and then did a more in-depth "retrospective longitudinal" study on 119 of the thyroid patients compared to 156 matched controls. They discovered that the thyroid-disabled people lost a "significant" amount of Free T4 and Free T3 …

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Analyze thyroid lab results using SPINA-Thyr

This post walks through the process of using the SPINA-Thyr to interpret thyroid lab test results. OVERVIEW SPINA-Thyr is a free diagnostic application. SPINA-Thyr takes thyroid laboratory test values TSH, Free T4 and Free T3 and performs calculations that enable in-depth evaluation of thyroid function, pituitary function, and T4-T3 conversion for people who are on no …

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2014 ATA thyroid therapy guidelines: 1. Levothyroxine

In this series of posts, I paraphrase a 2014 thyroid therapy guidelines document in a way that even the brain-fogged hypothyroid patient can understand more quickly and easily than reading the original version. MY SUMMARY'S AIMS AND METHODS Every thyroid patient understand the basics about what is being said about their therapy by the American …

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