I am taking just T3 for my severe hypothyroidism but the latest lot of tablets I had from the doctor seems to be very weak, is anyone else having problems with batch no 83201? Most of my hypo symptoms are returning with this batch of medication and even doubling the dose does not seem to make any difference. I think someone else mentioned that they were having similar problems with batch no 83202 and I know this has happened before some time ago. I have tried to raise the issue with my pharmacist but they have no mechanism for raising these type of problems with the manufacturer, the "yellow card" system is only for reporting severe side effects. The pharmacist suggested I write to the manufacturer with my concerns but I need to know first if anyone else is having similar problems.