I take synthroid 125 and I seemed to be doing o.k. Then going along for awhile, I seemed to be having trouble talking. I have bad allergies. Sometimes I talk o.k. and some days it is hard to get the words out. I know what I want to say, but I strain to get the word out. I have gone to a nose and throat dr. and he says it is old age. I am 83 none of my friends have this condition. I have ashma and have a breathing machine.