I would like to put a question to those of you on Erfa Thyroid and doing well on it: have you noticed a difference between batches? I am currently on two different batches (both expiring soon), and both seem to work just fine. However, I am beginning to worry that this will be a never-ending story where every good batch is followed by a bad one and you never know what to expect...at least that is how the STTM presents it. However, I'd like to know if the potency of the drug seems to have stabilised since production was moved a few years back, or if these problems continue? I need a backup plan in case Erfa stops working all of a sudden...I remember reading somewhere that some batches of Erfa were no more effective than sugar pills...however, I think it's safe to say that Erfa does not contain cellulose, as the pills taste very sweet and are not the least bit chalky.