Did you do any salt flushing early on? What about 500 mg niacin + 100 mg riboflavin (ATP cofactors)? How much iodide/iodine are you taking? What multivitamin? On another note, 3-6 grams vitamin C is typically what's recommended.
I took 300 mg (three hundred milligrams) Lugol's early on. Any sleep issues went away after a few days.
I did salt flushing for the first few days or so when I actually had detox symptoms (diarrhea, nausea), but I no longer have any detox symptoms when taking iodine, which is weird because there's no way my body was cleansed that fast. Most people report they feel more energy or just better overall when taking iodine, but I don't feel any different mentally wise. One thing I did notice that iodine had an effect on was my erection quality, so I guess it's good to know it actually did something.
Yeah I took the ATP cofactors as well. Multivitamin was Vita Jym. I started with 12.5mg and ramped up to 200mg after around a week before stopping due to the insomnia. Dosage wise, 12.5 mg felt the same as 200mg (didn't feel any different taking iodine).
I actually took a iodoral tablet yesterday (12.5mg) and surprisingly didn't have any problems sleeping, so I'm going to keep bumping up the dosage until I notice any sleep issues.
How long were you taking 300mg for? That's dangerously high if taking for an extended period of time. Read a post here saying at that dosage it can cause blindness.