1. Tablets
2. During my first taper in 2016 no, every subsequent attempt to change from dry to liquid yes
3. Milk, both whole and Lactaid whole
4. 0 during first several months of taper and then 9 when I crashed and 10 every time I tried to switch over after that
5. Held and then abandoned liquid
6. Yes but I would advise making sure to go at a cut rate that is reasonable for that person. I think 10% was too fast for me and I did not feel it for several months. I have no clue why I was able to tolerate liquid at first and then never again after that