I think the rapid heart rate last week was due to anxiety more than anything. I do have ringing in my ears that started Wednesday last week. I didn't inquire about the heart rate and it has settled on its own, but I did ask about the ringing in my ears. The doctor said to stop using the T-3 for a week and see what happens. The ringing could also be from Nasacort. It's not bad and doesn't keep me awake or anything like that, but it happened all of a sudden.