I have been taking about 6 drops of Lugols daily (40mg?) for some months and my prostate keeps improving. I now sleep through most nights without the former 1 or 2 trips to the bathroom and the feeling of not emptying completely. My sleep comes easier in general. Have also increased my lycopene (in tomatoes, pink grapefruit)...supposed to be good for the prostate. Iodine seems to have a cumulative effect so just keep taking it...the recommendation is 50mg for 6 months to detox. You have to work out what seems best for your body.
I tend to error on the side of caution but I keep slowly increasing the dose, one drop at a time.