I'm taking 100mcg.T4 and 10mcg. T3 first thing in the morning followed by mcg. T3 at intervals during the day. Today i was feeling lethargic but thought no more about it until I started feeling very dizzy. Blood pressure was 150 over 115. Got appointment with the duty doctor but by then my B.P. was back to normal. I'm due for bloods in a weeks time and I shall make an appointment with my own GP then.Is the dizziness down to the dose and if so what should I do ??