Started with a TSH of 12.31, got it down to about 4.3 over 2 years. Started with 100 micro units and worked it up every 3 months. Last week my TSH came back at 12.80. I feel great compared to before the medication. I have not noticed any change in my body. I take a multivitamin and a vitamin c every day at the same time as the Levo but I have been the whole time. I took Chantix ( smoke free medication ) for one month. What could of caused the spike in my TSH? My doc brushed it off and said not to take my vitamins at the same time. Any idea's ?View Thread