The joint pain, muscle weakness and such can be side effects from that. It sneaks up on you. Statins are a horrible thing, especially if you want to build your body up. Your cholesterol should not be brought too low or you will suffer!
I've taken a lot of Iodine and never had those kind of symptoms except while taking "Red Rice Yeast" and eating a low carbohydrate diet.
If this is not your case, then just disregard what I said.