Hello. I was diagnosed with Grave's Disease in January this year. I have been taking Carbimazole daily at 15mg to reduce my levels of T4 40, T3 18. The short story has been over three months I have been vomiting for a total of eight days in cycles of two, three or four weeks apart. The vomiting is violent & sustained over 48hrs. No other symptoms other than lethargy, dizziness during the sickness. SInce then, my thyroid levels have dropped only to T4 35 & T3 15. I missed four doses during this time. Any suggestions or ides. Is my body telling me that this is not really working for me?