Russ should answer that one for you, he's our resident thyroid 'exert'.
Got milk?
Elmo

http://community.webtv.net/elmoemerson/DocElmosHepFile

I didn't notice anything - with all the sides, who knows where one
particular side is coming from. In retrospect, I could identify some of
the problems as thyroid related, but before I knew it it was all a wash.

Thomas

ahhh, hahaha the thyroid, my old buddy!!!

Man I went f.cking bezerk about 4 months into tx, my thyroid went Hyper.
Couldn't sleep, couldn't stay still, my heart pounding 100-110 bpm at rest!
Hot all the time, agitated, pissed off. Just plain was crazy time!!

The doc put me on Atenolol to slow down my heart, that helped. 3 weeks later
my thyroid dried up and went Hypo, or not enough. My TSH (thyroid
stimulating hormone) went from zero to 59 in that time ( normal range is
like 0.5-5.5)

I gained 15 lbs in a week, swelled up like a sponge. Other symptoms were
coldness, very tired. The headaches were f.cking unbelievable. If it wasn't
for the Norco's I don't know if I could have made it.

Anyway I went on Synthroid, it took about 5 months for my TSH to stabilize,
though still to high. About the last month of tx I felt somewhat better.
It's been 2 1/2 months since ending the tx and I feel pretty good. My energy
level is great for all the hours I'm working.

The clinic where I got my tx from checked my TSH every month. My BCLD said
"we watch the thyroid real close".

Yours should too. Interferon can interfere with your thyroid!!!