I was at 750 mg from November 2018 to November 2019. Had been on 400 mg for several years prior but had gone through periods where I didn't take it, without recommendation from my doctor. My doctor titrated me by 200 mg each week so 750 first week, 500, 300, 100. Then I used a week each for the last 25 mg steps, 100, 75, 50, and 25. After I went off the last 25 mg I had severe insomnia which I relieved with another medication, gradually replacing Melatonin and then withdrawing the Melatonin when I got daytime sleepiness.