Sorry, just read your post. Yeah, BIG difference BTW T-3 and T-4.
You gotta go real easy on T-3 and you HAVE TO KNOW how much you are taking. You pyramid and drop. If it's T-4, that is much less potent. Mixing the two is serious.
T-3 by itself works fantastic at very small doses unless you are thyroid deficient.
Another problem is that you may have had a hyper thyroid and a fast metabolism prior to taking the stuff. These things have to be investigated prior, otherwise... well, you could wind up in an ER.
actually, i'm hypo-thyroid... or "was" hypo-thyroid since '03, which is odd, since now my t4/tsh is in the low-end of 'normal' (those things usually don't correct themselves), and even before that I've always had a fast metabolism. was prescribed t4, but got sick of doing the bloodwork every 4-6 months and having the dr play with the dosage.. so I just 'self-medicated' with research-grade t4, which turned out to be high dose t3. should've known better, since the same guy was well-known for overdosing his stuff (40mcg clen of his felt like 200mcg). i'd used 100mcg pharma t3 in the past when getting ready for shows or when working an Expo (01-03), but this stuff's effects were wayyyyy more profound than the 100mcg I used back then. i'd estimate 150-200mcg/day +