I don't know how long it takes Armour to get into your system, but when I got put on my thyroid medication the doctor told me it would take about a month to feel better. I would think it will take at least a couple of weeks before you notice a difference in your temperature and energy levels.

It might take a little while to get your meds adjusted-usually, you will take them for at least a month or 6 weeks and get your blood retested to see what your T3 levels are. Then the doctor can decide whether to up your meds or not. I know I have to get my blood retested once a year just to make sure I don't need my meds readjusted as I get older.

You might also want to go to the website below, if you haven't yet. It has a lot of really good information on hypothryoid.

http://thyroid.about.com/mbody.htm