Had taken Synthroid w/good success for yrs was switched to Levothyroxine --told there wouldn't be any difference, and same w/me, #'s/TSH levels are fine w/ 0.1 dose, but tired, now have high blood pressure, diagnosed w/UC 6 yrs ago (I wondered if there's something in the Levothyroxine that could have been an irritant to my system); also developed all kinds of allergies--some level to almost every food, so allergy specialist suggested I try rotation diet whereby I can't eat the same item more than 1x/every 4 days). GI specialist indicates they don't know the cause of UC (on initial diagnosis was asked if I was a runner--I was at the time, figure you're doing something to stay healthy, and it can be the cause for UC--Dr indicated that they find many of those diagnosed w/UC are runners); GI specialist indicates diet is not a factor for UC; I had asked my PCP to indicate NO SUBSTITUTES on my Rx for Synthroid, but Pharmacy had just auto refilled the Levothyroxine, so can't fill the Synthroid script 'til that 90-day supply is up. I'm hoping to get back on the Synthroid soon to see if that makes any difference in my energy level, etc.
When I was initially diagnosed w/an under-active thryroid more than 35 yrs ago, the specialist had told me to stick w/Synthroid as she said the generics were not as good--after so many yrs, and when several Dr's indicated the generics were found to be as effective, I believed them, thinking it wouldn't hurt to save some $$'s on my co-pays--live and learn. I'm praying the Lord will help me to make better decisions and enlighten the minds of the Physicians who provide my care and yours as well.
Thanks for sharing your experience--I just joined HealingWell (did a Google search for Levothyroixine and UC and found these threads). Thanks again, and may God bless you with improved health!