My endo said that I could either be put on PTU or Tapazole. I asked him what the difference was between the two and said they basically do the same thing. My question is, are the side-effects different? Is there anything else I should know about the differences? Have any of you tried both and have info about the differences? I have heard that Tapazole can also help some with the eye condition some people get with Graves (which I hope I am not getting…my eyes look a little bulging and they are extremely dry). Any info on these two drugs would be useful. Also, I have read that anti-thryroid meds only have a 30 to 40 % success rate at supressing Graves’. Is this true?