Quote from gipper62:Would pounding heartbeat/pulse be a symptom of hyper?
Yes, those could be the symptoms of hyper but it is probably your medication.
A fella I work with was put on .75mg of synthroid when first diagnosed hypo and he had the exact same symptoms you describe when initially on it.
His doc had him cut tablets in half for about a week or two so his body could adjust to the meds and then he started taking the full .75mgs. He did fine doing it that way and still is.
If your dosage is too high it will cause symptoms similar to hyper. The hypo medication essentially speeds you up.