question: I am on Levathyroxine, and have now had a second 3 day spell of very high blood pressure, palpitations, irritability and shortness of breath. Previously I ended up visiting the emergency dept. at hospital, who said my dose had been increased too rapidly. It stabilised, and I increased the dose (over 3 months) gradually to 0.50mg, then latterly to 0.75mg. After having the same (albeit not as severe) symptoms I reduced back down to 0.50mg, then later this week I continued to feel unwell, so this weekend I've reduced to 0.25mg. After 2 days of high blood pressure (155/109), I feel ok now. But I'm worried about the damage this is doing to my heart/increased risk of stroke? Been to various doctors and they are not listening?