This one has lots of big words.
http://www.ncbi.nlm.nih.gov/pubmed/11294826
This one is long, but easier to read.
http://www.emedicine.com/med/topic3740.htm
It sounds like the effect can be temporary, or not.
I won't say much as AR has already given you sites to visit. But I will say Amiodarone is reknowned to have a big impact on thyroid function if you already suffer from thyroid disease. If the thyroid disease has been caused by the Amiodarone, you can get a lesser effect when the drug is stopped, but whether it is totall reversible, I'm not sure.
I was on Amio for 18 months. It was discovered that I had TSH of 38. I can't tell if the Amio caused it or I had it anyway. I've been taken off amio, today, and put on Rytmonorm, 150/day. It does not affect thryoid. I await if it affects anything else.
oldie