hello.... In the past two years I had thyriod cancer and had my thyriod removed and radiation theraphy and now take synthriod daily, since going on the synthyriod I have developed a host of other problems, tias, high blood pressure, migraines like I have never had before, weakness and mental confusion.... my high blood pressure is the lower number , which I understand is the more dangerous one to have high, my question is, I have been told synthyriod is safe, but do some people ever hae problem tolerating it?  I am also on vit d theraphy for renal failure.... from lab work that was done..... I was told that was related to thyriod too?
Synthroid itself does not produce these problems. However, a wrong dosage (over or under) can result in problems. The best thing would be to get a serum TSH done (a blood test) and if it is normal then not to worry about Synthroid being the cause of your symptoms. In that case you should consult a physician for your blood pressure, and he will put you on medications for decreasing the same. If the TSH report is abnormal then you will have to adjust the dose of Synthroid and repeat the TSH every month till it comes normal.