We do not exactly want to directly promote any type of medication (hormone replacement). But we would very much like to emphasize that there are many different brands and sources and it's the one that works best for you that is important.
We, the ThyroMusketeers, are not doctors or medical professionals in any way, and don't claim to be. But we are suffering from thyroid disorders of varying types and have some experience with how our body's reacted to various types/brands of thyroid hormone replacement (medications). We hope to give you a bit of information that will leave to you with the knowledge to explore what is best for you and a base of information that will allow you to do that exploration.
.. with that said...
The most often prescribed thyroid hormone replacement. There are other brands, and generics, of Synthetic T4 hormone, including:
A synthetic formulation of the thyroid storage hormone, T4, it builds the reserves of itself in the body, taking 4 to 6 weeks to reach maximum saturation. The body must then convert that T4 hormone to the active T3 hormone, the hormone that the body uses to control so many of the functions it performs daily.
For some people this is all that is required and they do well on it. It can be a bit tricky getting up to the correct dosage, unfortunately many of the docs that prescribe this popular medication are not well versed in thyroid care and fail to do the proper tests to determine how this medication is working. It's also very important, even with the correct labs to dose according to symptoms.
Synthroid started it's big push in the 1960's. It's a patented product strongly promoted and distributed by the pharmaceutical company.
(natural thyroid glandular containing T4, T3, T2, T1 and calcitonin)
There are other brands here as well, including:
Time Cap Labs
Thyroid-S (formerly Thyroid Strong)
... and others
Whole desiccated (freeze dried) thyroid glands from pigs that were processed for human food, it contains all the components that our thyroids produce normally. T4 is the storage hormone, held in our body tissues to be converted, as needed, T3 the active hormone that our bodies use for every day function and health, T2, now found to be a great factor in metabolism, T1, not yet known as to it's function but suspected to be involved with brain function. And, last, but not least, Calcitonin, used to pull calcium from the blood and put it into the bones. There is no other source for this very necessary component other than our own thyroids or a glandular such as Armour, the most popular brand).
Natural thyroid glandulars have been in use since the 1890's. Since it's a natural product it is not patented and has a much lower profit margin than the synthetics. It's not as widely promoted, commercially, due to that but is widely promoted by word of mouth - the mouths being those of the people that find it to be a much better product for them then they found synthetics to be.