Can someone tell me if my GP has the right to reduced my medication without telling Me? I had a blood test over a month ago. I did not receive any communication from the my surgery to say my levels had changed or my prescription was changing. My prescription gets sent directly to my pharmacist who administered my thyronine. I continued taking my meds unbeknown to me the month was made up of 50 the other 25. I usually get two month's supply of 100. I had been taking the 50 without knowing the med had been changed. It was not until I opened the second month's packet that I noticed the size of the pill was smaller. I then realised this was 25. So I have been taking 50 for a month. I have felt very tired, nodding off and have the shakes but thought I had a virus. Does anyone know the protocol for GPs informing patients of reduced or a change in medication. Having taken a 100 for nearly 16 years I just got my meds and carried on taking one a day without even checking the box.