I'm hoping someone more knowlegable will chime, but I recall reading that when ever u r taking iodine and thyroid meds, u need to monitor how u feel.
This will allow u to lower your dose of thyroid hormone if necessary, so that other problems do not occur.
I'm sorry, but I don't take thyroid meds, so I don't know how they act.
Monitoring is using how u feel.
Perhaps, ginagirl can help u with the monitoring?
This site can help too.
http://www.stopthethyroidmadness.com/things-we-have-learned/