hypothyroid med reaction?

Anyone else have this?  Doc says I have hypothyroid and has me on T3 and T4 medication.  I have been having heart palpatations (sp?). Also I have noticed lately I get really cold and then really hot (I don't think hot flashes).  He already lowered the t3 medication.  But still having them.

This is just frustrating. Anyone else have experience with getting the right dose of thyroid meds?

Thanks, Susan

Sue- I have hypothyroid also and I use to have a reaction to the throid med causing me to have tachycardia. I already have a history of it anyways. It took some adjustment on the thyroid meds to keep my heart rate comfortable. I use to get anxiety or feel uncomfortable when this side effect would happen. I really do like the results once they got my throid under control. I have more energy.