I have quite a bit if experience with modafinil, armodafinil it’s isomer more specifically. It was a good replacement to combat the fatigue, after two years of taking it though it was difficult to regulate properly with it’s crazy long half life. Basically weekends I’d have to stop taking it to clear out of my system, to avoid insomnia, lethargy, and headaches, but I’d be unproductive for the weekend. If it wasn’t for that I’d be taking it more regularly.