I ordered a repeat prescription from gp surgery I am on t3/t4 combination. The gp who was doing prescriptions rang me to check which strength Eltroxin I wanted. When we had sorted that she asked me what Liothyronine was as she had never heard of it!! I was quite taken aback but said Levothyroxine is t4 and Liothyronine is t3. She then asked me why I was on it and I told her that I hadn't been right on t4 alone so she then said she had patients who weren't right on t4 how and where did I get it! So I told her the hospital and endo names and also told her to look at Thyroid UK. She then thanked me for educating her!!!! Still amazed!!