I was on 15mg per night, then30, then 45, then back to 30 then 15- over a period of 5 months. I took the last one 7 days ago. So far no side effects, in fact I feel better and more 'alive' than I have for months. Does this simply mean they worked and I am better now? How long after stopping might withdrawal side effects occur? What side effects should I look out for?