I am on 30mcg T3 NHS prescribed only. I take it in 3 split doses about 6:30am, 1:30 pm and after 7pm still experimenting with the evening dose as sleep isn't right yet - not helped by the clock change eeeek!.
In 2007 I was started straight onto 100mcg levo no gradual build up and felt dreadful very hyper tearful shaky etc etc. NHS then tried tweaking down. My TPO Antibodies were about 498 and TSH about 7.