I will stop the Armidex anywhere from 6-12 months.
Talk to your doc. My guess is that his protocol would be one of the following:
1) Wait until you get a low E2 reading and then back off a bit on the dosage
2) Back off a bit on the dosage and then a few weeks later take a reading to see how E2 turns out.
In other words, I'm not sure it's wise to quit cold turkey if that's what you are saying. What's worse long term, Arimidex or high E2? That will have to be decided upon by your own personal research and the doc if that is the situation that arises. (You can also back down the E2 and some guys can lose weight - you're thin of course - as an alternative #3 and #4.)