In addition to the medications, there are fillers or binders in the different preparations that cause some people problems. We are dealing with a lifelong condition, so
side effects, etc. are not something you just put up with for a couple of weeks like when you take an antibiotic, for instance. Furthermore, we are all different and have different comfort levels of FT3, FT4 and TSH. So, adjusting meds to proper levels is time consuming and trying.