I am an 86 year old female and never had a thyroid problem before, but since being on Plavix after a stent implant in 2016, I keep losing so much weight; am so tired and dizzy. My TSH level is 6.550. My diet is very clean, but unless I eat a lot of carbs per day, I lose 2 or 3 pounds overnight. I have always had a problem with drugs and bad reactions. What can I do to stop losing so much weight? I stopped the Plavix 3 months ago. My blood pressure is okay systolic, but low on diastolic. My cholesterol ratio is 2.9.