Really bad fibromyalgia, heart palpitations, and weight gain. Eventually I switched to
Armour and Synthroid, then
Armour only, then Naturethroid, then finally NP
Thyroid by Acella. It seems to work the best. It is hard to tell you where to start exactly when it comes to switching. All I can suggest is you start at 30mg and slowly increase. If you find you have a bad reaction, DO NOT get discouraged. You can't hurt yourself from taking too much Desiccated Thyroid.