July 26,
Dr. Mark, I do appreciate your answer to my previous question about
too much levothyroxine. My next question is this, if my dosage of levothyroxine went straight from 50mgc to 150mcg and it started the heart pounding and it hasn't completely stopped in two years and my levothyroxine has now slowly been lowered back to 50mcg, and the problem still exist, what could cause that? Also when my doctor tried to raise it to 75mcg, it started the heart pounding right away.