The replacement hormones for T4, which come under a variety of names, all contain levothyroxine sodium as the base ingredient, which would be used the same in your body no matter WHAT the brand name of the pill is. The pills do vary from brand to brand, however, in the more inert aspects –i.e., the “fillers” and food colorings used to make the active chemical into pill form. It is usually these ingredients, and an individual’s response to them, that might cause an unusual reaction, whether it is an allergy to a specific filler or color dye, an inability to fully digest the pill, or whatever. I looked at the “makeup” of a couple of the replacement hormone pills once, and discovered that one, for instance, contained talc while another one did not. The dyes used were slightly different. So, generally speaking, sometimes someone cannot take one of the brands without side effects, but another brand will be OK.
I hope this helps.
Bobbi
Anonymous
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