I was on 75 levo, until I started ndt last Thursday. I then dropped the levo to 50 and have been on a quarter grain of Nature-Throid and, on advice from Clutter, plan to stay on that for a couple of weeks, so my body can get used to the T3. (I've got poor converstion and high cortisol). However, I have been thinking: a quarter of a grain is only 8.5 mcg T4 and 2.25 mcg T3, so I am down by a few mcg T4. Do I really need to reduce to 50, should I stay at 75, or should I cut a 25mcg in half and add that to the 50?