Just curious if anyone has had any experience in using T3 in combination with or in addition to the standard T4 [Synthroid etc.] treatment. I've been on T4 for nearly 3 months and, per my doctors approval, stepped the dosage from a starting point of .75 to my current 1.75 and while i've had *some* improvements, there is still much that has not changed. I've been reading about the addition of T3 and it sounds like it makes a pretty significant difference, however I was hoping to hear from those who have had first hand experience.