I was diagnosed with Graves by accident through a routine blood test for work about a month ago. I had very minimal symptoms and was told by a specialists that it appeared I’d only recently acquired the disease. He put me on a 20mg daily dose of Carbimazole and during the past four weeks since I’ve been on it my health has absolutely gone to the dark side. I’m 35 years old, a very fit, very healthy male from Sydney, Australia… I normally work out in the gym, run, play tennis, good diet and since on the Carbimazole I really can’t do anything, feeling very weak and started getting in the most recent two weeks. The last week I’ve scored a bad virus so I went to the doctor, lucky I did as I had a blood test and my white blood count had dropped to a dangerous level. Strangely while on the Carbimazole for the four weeks my T3 levels doubled and T4 levels went up by a third. Ok, so the specialist has taken me off the Carbimazole and put me on 450mg per day of PTU (Propylthiouracil). I start taking them tonight, needless to say I’ve never been more wary about taking tablets and really I just wanted to know what the difference was between PTU and Carbimazole and if anyone heard of these types of reaction to the drug. My specialist thought it to be strange. Cheers.